Answered: A decade-old study found that the…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Related questions

Question

A decade-old study found that the proportion,

, of high school seniors who believed that "getting rich" was an important personal goal was

70%

. A researcher decides to test whether or not that percentage still stands. He finds that, among the

230

high school seniors in his random sample,

141

believe that "getting rich" is an important goal. Can he conclude, at the

0.01

level of significance, that the proportion has indeed changed?

Perform a two-tailed test. Then complete the parts below.

Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)

(a)	State the null hypothesis H0 and the alternative hypothesis H1 .
H0:
H1:
(b)	Determine the type of test statistic to use.
	▼(Choose one)
(c)	Find the value of the test statistic. (Round to three or more decimal places.)

(d)	Find the p-value. (Round to three or more decimal places.)

(e)	Can we conclude that the proportion of high school seniors who believe that "getting rich" is an important goal has changed?
Yes No