ECO254
1 / 151
The standard deviation is to the mean as the ____________ is to the regression line
2 / 151
When a die is thrown once, the probability of getting one is _____
3 / 151
Regression analysis is widely used for ____ and forecasting
4 / 151
An hypotheses is formulated with the basic idea of nulifying the hypotheses and rendering the hypothese _____
5 / 151
Lebesgue measure is the standard way os assigning a measure to a_____ of an n-dimensional volume
6 / 151
Regression analysis is a statistical process for estimating the relationship among ______
7 / 151
A Company short lists 12 applicant for an interview out of which 4 are men. If there are only five vacant posts to be filled, find the probability that the list of successful applicant contains at least 2 men.
8 / 151
Matching is carried out by identifying pairs of values consisting of one observation from each of the two _______
9 / 151
Generating a data is important in _______ analysis
10 / 151
_______ is the distribution that make use of discrete varaibles and combinatorial analysis
11 / 151
In the case of more than one explanatory variable is called
12 / 151
The t statistic was introduced by Willian Sealey Gosset a ______ working for Guinness Brewery in Dublin Finland
13 / 151
Given the following simple regression model Y = ao + a1X1 + a2X2, the dependent variable in the model is
14 / 151
__________ are collections of test statistics that is used for the analysis of stratified categorical data
15 / 151
If the parameters are over estimated, the sampling errors are _______
16 / 151
A _________ is the set of all possible values of a particular statistic
17 / 151
The standard deviation of the sampling distribution is known as the _________
18 / 151
sampling error (E) is defined as the difference between the sample statistic (s) and the _____ being estimated
19 / 151
The one tailed test gets its name from testing the area under one of the tails (sides) of a _______
20 / 151
_______ s a statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both.
21 / 151
_____ is used to determine all reasonably likely values of the difference between two population means
22 / 151
Given the following simple regression model Y = ao + a1X1, the independent varaible in the model is
23 / 151
Regression analysis is also used in casual relationship between a linear model that is between the dependent variable to an
24 / 151
The density function is symmetrical about x equal to zero, so that its median is _______
25 / 151
Any assumptions made with the sole purpose of rendering the statistical hypothesis significant is called a _______
26 / 151
Three out of the 9 finalists in an African American beauty competition are Nigerians. If two winner are to be selected, find the probability that; at least one of them would be a Nigerian.
27 / 151
A graph for frequency distribution can be supplied by a histogram or by a polygon graph often called a _____
28 / 151
A doctor claims that the mean weight of babies delivered at her hospital is 4.2kg. A Statistician takes a sample of 10 babies and obtains the following weights: 1.2, 2.8, 2.2, 3.1, 3.2, 3.7, 2.7, 4.0, 4.4, 4.1. Test the doctor's claim at 95% level of significance.
29 / 151
In a statistics examination for secondary students, the 23 females used in the study has a mean score of 81 and a variance of 12 while the 20 males used has a mean score of 78 and a variance of 10. Do you think gender have an effect on the score of there secondary student at 99% level significance?
30 / 151
One explanatory varaible is called a ______
31 / 151
The null hypothesis in the chi-square test states that
32 / 151
In hypotheses testing some errors are committed in the quest for taking a good __
33 / 151
_____ is a statistics process for estimating the relationship among varaibles.
34 / 151
___________ enables us to have an estimate of how sample mean deviates from the population mean.
35 / 151
The mean mark of students in statistics test is 68 with standard deviation of 30. If samples consisting of 64 students each are obtained from the students population of 6,000. Calculate the standard deviation of the sampling distribution of mean if sampling is done with replacement
36 / 151
A deck of cards has a uniform distribution because the likelihood of drawing a heart, a club, a diamond or spade is equally _____
37 / 151
Any assumptions made with the sole purpose of rendering the statistical hypothesis insignificant is called a ______
38 / 151
The two types of hypothesis are ______ and _____ hypothesis
39 / 151
______ is the values of a population parameter and that of the corresponding statistic that are not always the same
40 / 151
Probability distribution assigns a probability to each measurable subset of the possible _____
41 / 151
A ___ is considered to be known when we know the probability distribution f(x) (probability function or density function) of the associated random variable x
42 / 151
Given Z = Bo + B1X1 + B2X2. From the equation above, the explanatory variables are _______
43 / 151
The Cauchy distribution is often used in statistics as the canonical example of pathological distribution since both its mean and its variance are ______
44 / 151
Confidence interval is used to determine all reasonably likely values of the difference between two ___________
45 / 151
_____ is used when testing for independence in a contingency table
46 / 151
_is an approach use in ANOVA (that is a region analysis involving two qualitative factors) to detect whether the factor variables are additively related to the expected value of the response variables
47 / 151
In statistics, _____ is an approach for modelling the relationship between s scalar dependent variable y and one or more explanatory variables denoted x
48 / 151
A Company short lists 12 applicants for an interview out of which 4 are men. If there are only five vacant posts to be filled, find the probability that the list of successful applicant contains all women
49 / 151
_________ is a test that allows us to compare a collection of categorical data with the theoretical distribution
50 / 151
An F test is a statistical test in which the test statistics has ____ distribution under a null hypothesis situation
51 / 151
The probability (or risk) or committing type 2 error is denoted by the Greek letter
52 / 151
A discrete probability distribution is a probability characterized by a probability ______
53 / 151
In statistical analysis the 99% confident level is also known as ____
54 / 151
________ theory deals with the study of the relationships that exist between a given population and the samples drawn from the population.
55 / 151
Simple Regression analysis is also called ______ Regression equation
56 / 151
__________ limit are the end points of the confidence interval.
57 / 151
The _____ distribution is a two parameter family of continuous peobability distributions.
58 / 151
Given Y = a + Bx1 + Cx2. The equation above is an example of _____
59 / 151
Type 2 error is a situation when one accepts the hypothesis when it should be
60 / 151
Given a population consisting of numbers 1,2,3,4,5,6. The mean of the population is
61 / 151
The t statistics was introduced in ________ year
62 / 151
_____ error occurs when/if an hypothesis is rejected when it should be accepted
63 / 151
Uniform distribution can also be seen as a statistical distribution in which every possible outcome has ______
64 / 151
sampling where each member cannot be chosen more than once is called sampling _____
65 / 151
Ho in hypothesis testing is ________
66 / 151
If the aim of an hypothesis is to conclude that one item is better or less than the other then we have ______
67 / 151
If the parameters are under estimated, the sampling errors are ______
68 / 151
The calculation of sampling distribution is a step forward to look at different ways of obtaining distribution of proportion process of _____ data
69 / 151
If the distribution of x is continuous, then x is called a _______ random variable
70 / 151
A coin also has a uniform distribution because the _____ in a coin toss is the same
71 / 151
The distribution like the binomial and poisson distribution is a probability that makes use of ______ variables
72 / 151
_____ test is a statistical test that is applied to categorical data to investigate how likely it is that any observed difference betweeen the sets arose by chance.
73 / 151
The term regression was introduced by ______
74 / 151
The _____ distribution has been applied to model the behaviour of random varaibles limited to intervals of finite length in a wide variety of disciples
75 / 151
Hypothesis may be directional or ___
76 / 151
______ measure is the standard way of assigning a measure to a subsets of an n-dimensional volume
77 / 151
The t test was ____ and ____ of two samples to make comparism
78 / 151
Chi-square goodness of fit test is applied when you have one categorical varaible from a ____ population.
79 / 151
The regression equation for predicting number of speeding tickets (Y) from information about driver age (X) is Y = -.065(X) + 5.57. How many tickets would you predict for a twenty-year-old?
80 / 151
In an experimental research, the scientist may have two groups, an experimental group and a ______
81 / 151
In this situation, the population for which inferences is to be made is assumed to be normally distributed with _______
82 / 151
_____ test ia a collection of test statistics that is used for the analysis of stratified categorical data
83 / 151
A ______ Probability distribution is a probability distribution that has a probability density function
84 / 151
If an hypothesis talk about no difference then we have ______
85 / 151
A t-test is any statistical test in which the test statistic follows a student’s t ______ if the null hypothesis is supported.
86 / 151
The discrete uniform distribution is commonly used in ______ programs that make equal probability random selections between a number of choices
87 / 151
When an equation is in a general term in a multinomial expansion it is called ____
88 / 151
If 150 tosses are made of a fair coin, find the probability that between 38% and 78% will be heads
89 / 151
In test of hypothesis, the maximum probability of risking a ______ is known as the level of significance
90 / 151
In quality control, one might demand that the probability of a 800g package containing between 790g and 810g should be not less than _______
91 / 151
A type of photocopier has a paper Jam on average once every 3000 copies. What is the probability that there will be more than two jams in a 3000 copy run?
92 / 151
_________ is a population commonly contains too many individuals to study conveniently
93 / 151
______ is a tentative statement in a statistical analysis
94 / 151
The probability (or risk) or committing type 1 error on a true null hypothesis is denoted by the Greek letter
95 / 151
______ error occurs when/if an hypothesis is accepted when it should be rejected.
96 / 151
The standard deviation is to the mean as the ____________ is to the regression line.
97 / 151
The ______ curve is one of the most popular models used in statistical tests of hypothesis
98 / 151
The numerical value of the decision rule is called _____
99 / 151
Interval estimation involves estimating an interval which is known as ______
100 / 151
Application of Simple Linear regression analysis is the way by which we subject different data to statistical analysis by using computer software such strata, e-view to analyse and predict the relationship between the dependent variable and
101 / 151
______ is a random varaibles that we assigns a probability to each possible value
102 / 151
A continuous probability distribution is a probability distribution that has a probability ______ function
103 / 151
______ is a statistical test that is applied to categorical data to investigate how likely it is that any observed difference between the sets arose by chance and it is good for unpaired data that can be seen from large samples.
104 / 151
Regression analysis is widely used for ______ and ______
105 / 151
Three out of the 9 finalists in an African American beauty competition are Nigerians. If two winner are to be selected, find the probability that only one of them would be a Nigeria.
106 / 151
Another technique that can be employed with respect to the issue of rejecting or accepting Ho is _______
107 / 151
The values of a parameter and that of the corresponding satatistics are not always the same _____
108 / 151
Null hypothesis are usually denoted with the symbol _____
109 / 151
Probabilities associated with individual values of x cannot be _______ or greater than 1 since this has no meaning
110 / 151
The Cauchy distribution is named after _____
111 / 151
______ test is used when testing for independence in a contingency table
112 / 151
The T statistic was introduced in _______ by William Sealy Gosset, a chemist working for the Guinness Brewery in Dublin, Ireland
113 / 151
In test of hypothesis, the maximum probability of risking a type 1 error is known as the ________
114 / 151
___________ is a statistical test in which the critical area of a distribution is two sided and tests whether a sample is either greater than or less than a certain range of values.
115 / 151
__________ occurs when/if an hypothesis (Null hypothesis) is rejected when it should be accepted and this occurs when the hypothesis value falls within acceptance region.
116 / 151
A _____ is considered to be known when we know the probability distribution
117 / 151
One of the uses of statistics is to make a decisive ________
118 / 151
______ is a type of probability distribution in which all outcomes are equally alike
119 / 151
Calculate the varaince of uniform distribution given that (a + b) = 6/200 and b = 2.20 while a = 1.10
120 / 151
In Probability and Statistics, a probability distribution assigns a probability to each measurable sunset of the possible outsomes of a ______
121 / 151
the first important attribute of a sample is that every individual in the population from which it is drawn must have a known _____ chance of being included in it
122 / 151
Vivian Odishika company prints baseball cards. The company claims that 40% of the cards are rookies, 70% veterans and 10% are all stars. Suppose a random sample of 100 cards has 50 rookies, 48 veterans and 8 all stars. Using 95% level of significance, Calculate the claim of the compnay
123 / 151
Calcualte the mean of a uniform disribution given that (a+b) = 7/128 and b= 6.40 while a= 2.10
124 / 151
The term regression was introduced by _____
125 / 151
A regression analysis is inappropriate when
126 / 151
In a statistics examination for secondary students, the 12 females used in the study has a mean score of 71 and a variance of 22 while the 10 males used has a mean score of 77 and a variance of 8. Calcualte the confidence intervals at 99% level of significance.
127 / 151
If an individual were selected at random from a large group of adult females, the probability that it has height M is precisely 68 inches (that is 68.00 inches) would be zero. What is the probability that M is between 67.00 inches and 68.00 inches.
128 / 151
Given a constant b such that the function f(n) = bn square is 0,1,2. Find the probability of x is greater than 1 and less than 2
129 / 151
An __________ can be defined as any statistical test in which the test statistics has an F distribution under a null hypothesis situation and it is usually used when comparing statistical models in a data set so that we can identify the mode that best fits the population where the date were sampled
130 / 151
_____ statistical test in which the critical area of a distribution is one-sided
131 / 151
Alternative hypothesis are usually denoted with the symbol _____
132 / 151
Sampling where each member of the population may be chosen more than once is called sampling ________
133 / 151
A graph for frequency distribution can be supplied by a _____
134 / 151
_____ s the value of a statistic obtain vary from one sample to another even when equal samples are selected from the same population using the same procedure
135 / 151
___________ is a statistical test that is used on paired nominal data
136 / 151
F Test was coined by George, W. Snedeaor but he used it to honour Sir Ronald A. Fisher and Fisher initially developed the statistics as the variance ratio in _____
137 / 151
When a random varaible takes values from a continuous probabilities that are non zero, this can only refer to _____
138 / 151
Hi in hypothesis testing is _______
139 / 151
A _____ can said to be a measurement of how expectations are compared to results.
140 / 151
In the case of one explanatory variable is called ___________ linear regression.
141 / 151
One of the uses of statistics is to make a ______
142 / 151
If the 0.05 level of significance is to be used in a two tailed test, the 0.05 level is shared between the two ends of the tails giving 0.025 or __________
143 / 151
The two tailed test gets its name from testing the area under both of the tails (sides) of a _______
144 / 151
A ________ can said to be a measurement of how expectations are compared to results.
145 / 151
The ____ distribution is a family of continuous probability distributions defined on the interval of 0 and 1 parameterized by two positive shape parameters
146 / 151
Null hypothesis is denoted as ______
147 / 151
Alternative hypothesis is denoted as ______
148 / 151
A _____ is any statistical test in which the test statistic follows a students's t distribution if the null hypothesis is supported.
149 / 151
_____ test is a statistical test that is used on paired nominal data
150 / 151
A continuous random varaible is the one which can take a continuous range of _____
151 / 151
Hypotheses are formulated and different types of statistical tests are carried out in order to make a reasonable ____
Restart quiz
Rate this quiz