ATTENTION:
Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.
Good luck!
STT206
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1. 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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2. 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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3. The following are types of correlation except _________
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4. 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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5. ___________ refers to the formula or statistic which has been chosen to provide an estimate of the population value
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6. Calculate the variance of the date in the table below
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7. Like other quartiles, the median quartile is at what percent mark:_____%
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8. The boundaries separating the items in a given distribution into quarters are called ______
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9. Compute the harmonic mean of 5, 6 and 7
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10. What is the range of the data 5, 2, 2, 3, 7, 8, 18, 1 ?
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11. A graphical method of showing correlation between two variables is called __________
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12. The conjectural statement a postulate, or a proposition about an assumed relationship between two or more variables is known as _____
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13. Distributions involving two discrete variables are called ________
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14. Purposive samples can be occasionally referred to as ______ samples
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15. When an investigator uses questionnaire to collect data from group of people in a population, such data is called ______data
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16. Out of all measures of dispersion, the easiest one to calculate is_____
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17. The branches of statistics that deals with mutual dependence or inter-relationship of two or more variables is _____
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18. Method of forecasts used to generate the general picture (or trend) behind a set of data or time series is ______________
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19. Variables whose values are fractional and are points on an internal are called _________
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20. The mathematical method of determined the points estimate of ‘a’ and ‘b’ from the available sample points is called ____ method
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21. In simple linear regression, the numbers of unknown constants are ______
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22. _____________________ provides various types of statistical information of either Qualitative or quantitative nature
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23. The second quartile is equivalent to the _________
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24. Calculate the mean of the date in the table below
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25. Variables whose values are given as numerical quantities is called _____ variables
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26. 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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27. 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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28. A method that involves conference techniques by which a group of people attempts to find solution for specified problems is known as _______
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29. The following are types of correlation except _________
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30. A summary measure that describes any given characteristic of the population is known as a ________
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31. 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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32. Hypothesis testing starts with a statement about population parameters such as _________
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33. Forecasts that concern the distant future are _______ forecasts
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34. Data collected on a particular variable or set of variables over time is called _________
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35. Data collected on a particular variable or set of variables over time is called _________
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36. Any characteristics of an object that is capable of assuming different values is called _______
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37. Variables that assume any value within an interval or have the property of infinite divisibility are _____ variables
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38. The payoffs associated with each possible outcome in a decision problem should be listed in ______ table
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39. 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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40. Distributions involving two discrete variables are called ___________
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41. The chi-square goodness-of-fit test is be used to test for _____
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42. Analysis of Variance (ANOVA) is a test for equality of _____
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43. the most common index numbers are _____
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44. The difference between the highest observation and the lowest observation is called ________
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45. The degrees of freedom for the test statistic for μ when σ is unknown is __________
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46. In null hypothesis for a Chi-square test, both variables are _____
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47. The first moment about mean is given by [ H_{1}=]
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48. Distributions in which there are only one variable are called ___________
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49. Multiple regression is also known as _____ regression
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50. Indicators which reflect the relative changes in the level of certain phenomenon in any given period are ________
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