A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100. What is the estimated ...

A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100. What is the estimated standard error for the sample mean?
 
  A) 4
  B) 2

Question 2

What is indicated by a large value for the chi-square statistic?
 
  A) The sample data (observed values) do not match the null hypothesis.
  B) There is a good fit between the sample data (observed values) and the null hypothesis.
  C) There is a good fit between the sample data (observed values) and the null hypothesis.
  D) The observed values from the sample data are consistently smaller than the expected values.

Question 3

A sample of n = 4 scores has SS = 48. What is the estimated standard error for the sample mean?
 
  A) 1
  B) 2
  C) 4
  D) 16

Question 4

A researcher used a sample of n = 60 individuals to determine whether there are any preferences among four brands of pizza. Each individual tastes all four brands and selects his/her favorite. If the data are evaluated with a chi-square test for goodness of fit using  = .05, then how large does the chi-square statistic need to be to reject the null hypothesis?
 
  A) greater than 7.81
  B) less than 7.81
  C) less than 5.99
  D) between 5.99 and 7.81