20. Degrees of freedom affect the of the t distribution A. mean B. population si
ID: 3064433 • Letter: 2
Question
20. Degrees of freedom affect the of the t distribution A. mean B. population size C. shape D. skew 21. As degrees of freedom increase (theoretically to infinity), the extent to which st estimates i A. increases. B. descreases. C. stays the same. D. changes in different ways, depending on the population. 22. The ratio used to calculate the z and t statistics compares systemic error to A. degrees of freedom. B. the population mean C. variance. D unsystemic error. 23. In the t-test for related samples, the unit of measurement is A. the difference between the entire sample and the population. B. the difference in means between paired participants C. the difference between two sample means. D. the relationship between two independent variables. 24. The Pearson's correlation coefficient, r, shows A. the strength of a relationship between two variables. B. whether or not a relationship is significant C the degree to which one variable causes another D, the difference between a correlation coefficient and the population mean.Explanation / Answer
20) degrees of freedom affect the shape of the the t distribution.
23) if the two samples are related then we used paired test
That is ; the difference in means between are paired participants.
24) correlation coefficient is used to find strength and direction of a relationship between two variables.
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