The Following Hypothetical Data Were Obtained from a Random Sample

Essay

The following hypothetical data were obtained from a random sample of college freshmen. They represent attitude scores toward a statement made by the President, "The economy has improved in the last 12 months."Scores ranged from 7 (strongly agree) to 1 (strongly disagree). The investigator was interested in the variability of attitudes among this year's freshman class on this question.3 , 6 , 5 , 5 , 7 , 4 , 2 , 6 , 5
a. Arrange these data into an appropriate frequency distribution.
b. Calculate the range.
c. Do the numbers constitute a sample or a population?
d. Find the standard deviation.