(Ch8) In a large economics class, the professor announced that the scores of a recent exam were normally distributed from 51 to 87. Using the Empirical Rule on µ ± 3σ to estimate σ (that is, σ=[upper limit-lower limit]/6), how many students would you need to sample in order to construct a 90 percent confidence interval of the population mean score, with an allowable error of ±2? (Hint: use the critical value Z0.05=1.645 for a 90 percent confidence interval) a. About 25 students b. About 35 students c. About 17 students d. About 188 students
(Ch8) In a large economics class, the professor announced that the scores of a recent exam were normally distributed from 51 to 87. Using the Empirical Rule on µ ± 3σ to estimate σ (that is, σ=[upper limit-lower limit]/6), how many students would you need to sample in order to construct a 90 percent confidence interval of the population mean score, with an allowable error of ±2? (Hint: use the critical value Z0.05=1.645 for a 90 percent confidence interval) a. About 25 students b. About 35 students c. About 17 students d. About 188 students
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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(Ch8) In a large economics class, the professor announced that the scores of a recent exam were
a.
About 25 students
b.
About 35 students
c.
About 17 students
d.
About 188 students
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