stats midterm cont

there is a 6 point difference between two sample means. if the two sample means have the same variance, then which of the following values for the variance would make the mean difference easiest to see in a graph showing 2 distributions

2

what is the mode for the population of scores shown in the frequency distribution table x-5, 4, 3, 2, 1 f- 1, 2, 3, 4 ,2

2

in a population with o=8, a score of X=44 corresponds to a Z score of z=-0.50, what is the population mean?

48

what is the value of (SX)2 for the score 1,5,2

64

in a population of scores, X=83 corresponds to z=-0.50 and x=93 correspomds to z=+2.00. what are the values for the population mean and standard deviation

85

in a sample of n=6 scores, the smallest score is x=3, the largest score is x=10, and the mean is M=6. if the largest score is changed from x=10 to x=22, then what is the value of the new mean

M=8

the students in the psychology class seemed to think the midterm exam was very easy. if they are correct, what is the most likely shape for the distribution of exam scores

Negatively skewed

what frequency distribution graph is appropriate for scores measured on a nominal scale

only bar graph

what is the final step to be performed in the mathematical expression, (SX)2

square the sum of the scores