# STT206

## Category:STT206

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STT206

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

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

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

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

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

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

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

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

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

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

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

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

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M.  The following are measurement scales except ________

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N. Distributions involving two discrete variables are called __________

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

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P. Individual data can also be called ____________ data

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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 _______

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

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

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

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

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

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W.  Quantitative variable can be classified into _________

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

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Y.  Quantitative variable can be classified into ________

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

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

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

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

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

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

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

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AG.  The second quartile is equivalent to the __________

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AH. The following are types of correlation except _________

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AI. ANOVA means _______

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

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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 ____

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AL. Multiple regression is also known as _____ regression

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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 _______

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

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

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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____

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

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

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

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

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

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

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

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

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

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AZ. the most common index numbers are _____

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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

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BB. The following are measurement scales except _______

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

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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 ____

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

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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

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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

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

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

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

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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

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

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

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

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

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

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BQ. Distributions involving two discrete variables are called ________

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

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