STT206

A. Calculate the standard deviation of the date in the table below 

B. Compute the harmonic mean of 5, 6 and 7

C. The first moment about mean is given by [ H_{1}=]

D. A summary measure that describes any given characteristic of the population is known as a ________

E. What is the range of the data 5, 2, 2, 3, 7, 8, 18, 1 ?

F. ___________ refers to the formula or statistic which has been chosen to provide an estimate of the population value

G. Variables whose values are whole numbers or integers are called _________

H. Distributions in which there are only one variable are called __________

I. Where T.S.S is 172.5 and W.S.S.S is 125.5, B.S.S.S will be ________

J. What is the range of the data 5, 2, 2, 3, 7, 8, 18, 1 ?

K. Range of 8, 12, 5, 15 is ______

L. Variables whose values are fractional and are points on an internal are called _________

M.  The following are measurement scales except ________

N. Distributions involving two discrete variables are called __________

O. When the correlation coefficient r, equals zero, then __________

P. Individual data can also be called ____________ data

Q. The method of least squares dictates that we choose a regression line where the sum of the square of deviations of the points from the line is _______

R. Forecasts based solely on past and present values of the variable to be forecast is called_______ forecasts

S. Data collected on a particular variable or set of variables over time is called _________

T. The measure of dispersion that ensures highest degree of reliability is ___________

U.  The boundaries separating the items in a given distribution into quarters are called ______

V.  The difference between the highest observation and the lowest observation is called ________

W.  Quantitative variable can be classified into _________

X. When the correlation coefficient r, equals zero, then __________

Y.  Quantitative variable can be classified into ________

Z. The chi-square goodness-of-fit test is be used to test for _____

AA. The degree of randomness of selection would depend upon the process of selecting the items from the _________

AB. Hypothesis testing starts with a statement about population parameters such as _________

AC. A graphical method of showing correlation between two variables is called ________

AD. Calculate the mean of the date in the table below

AE.  Any characteristics of an object that is capable of assuming different values is called _______

AF. Calculate the variance of the date in the table below

AG.  The second quartile is equivalent to the __________

AH. The following are types of correlation except _________

AI. ANOVA means _______

AJ. A graphical method of showing correlation between two variables is called __________

AK. A bus starts with 6 people and stops at 10 different stops, how many different ways can the 6 people depart if any passenger can depart at any bus stop ____

AL. Multiple regression is also known as _____ regression

AM. If the points on the scatter diagram show no tendency either to increase together or decrease together the value of r will be close to _______

AN. Given the data, 5, 8, 3, 4, 6, 1. Obtain first non-central moment

AO. Housing unit, number of students in a class, number of goals scored and number of cars are examples of ______ variable

AP. Consider a set of data on monthly sales of a company’s product, the mean of which was found to be N240,000; the mode found to be N135,000; and the standard deviation found to be N85,000. The Pearson’s No. 1 Coefficient of skewness would be____

AQ. Variables whose values are given as numerical quantities is called _____ variables

AR. Purposive samples can be occasionally referred to as ______ samples

AS. A graphical method of showing correlation between two variables is called __________

AT. Data which are collected by someone else or some organization either in published or unpublished forms is called ________ data

AU. Variables that assume any value within an interval or have the property of infinite divisibility are _____ variables

AV. The conjectural statement a postulate, or a proposition about an assumed relationship between two or more variables is known as _____

AW. _______ is value of the sample statistic which is taken as an approximation of the parameter value

AX. The branches of statistics that deals with mutual dependence or inter-relationship of two or more variables is _____

AY. Indicators which reflect the relative changes in the level of certain phenomenon in any given period are ________

AZ. the most common index numbers are _____

BA.  Consider a set of data on monthly sales of a company�??s product, the mean of which was found to be N240,000; the mode found to be N135,000; and the standard deviation found to be N85,000. Calculate Coefficient of skewness

BB. The following are measurement scales except _______

BC. Distributions in which there are only one variable are called _________

BD. If wale predicts that value of 50kg bag of rice will rise in 2022 based on past year (2016) and present year (2019), wale assumption is based on ____

BE. Out of all measures of dispersion, the easiest one to calculate is_____

BF. Scale that has all the properties of the nominal, ordinal and interval scales including the additional property of having an absolute zero point is known as ____ scale

BG. The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation yi

BH. A logical approach used in an investigation to indicate possible alternatives or choices from which an acceptable solution may be derived is called______

BI. When an investigator uses questionnaire to collect data from group of people in a population, such data is called ______data

BJ. The degrees of freedom for the test statistic for μ when σ is unknown is __________

BK. The values of (xi,yi) are given as (1,2), (2,4), (3,8), (4,7), (5,10), (6,5), (7,14), (8,16), (9,2), (10,20) find the value of summation xi

BL. Variables whose values are whole numbers or integers are called ________

BM. The mathematical method of determined the points estimate of ‘a’ and ‘b’ from the available sample points is called ____ method

BN. Correlation is used to determine the extent at which the variable are correlated is called_________ correlation

BO. Data collected on a particular variable or set of variables over time is called _________

BP. The chi-square test is not very effective if the sample is _______

BQ. Distributions involving two discrete variables are called ________

BR. Under coefficient of correlation, When r = 0 i.e. there is ________ relationship