A decade old study found that the proportion, p of hi 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 250 high school seniors and his random sample, 191 believe that "getting rich" is an important goal. Can he conclude, at the 0.10 level of significance, that the proportion has indeed changed? Perform a two tailed test. Then complete the parts below. Carry your intermediate computation to three or more decimals.
A decade old study found that the proportion, p of hi 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 250 high school seniors and his random sample, 191 believe that "getting rich" is an important goal. Can he conclude, at the 0.10 level of significance, that the proportion has indeed changed? Perform a two tailed test. Then complete the parts below. Carry your intermediate computation to three or more decimals.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A decade old study found that the proportion, p of hi 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 250 high school seniors and his random sample, 191 believe that "getting rich" is an important goal. Can he conclude, at the 0.10 level of significance, that the proportion has indeed changed?
Perform a two tailed test. Then complete the parts below. Carry your intermediate computation to three or more decimals.
Transcribed Image Text:(a) State the null hypothesis and the alternative hypothesis H₁.
Ho
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.)
I
(d) Find the two critical values. (Round to three or more decimal places.)
and
(e) Can we conclude that the proportion of high school seniors who believe that
"getting rich" is an important goal has changed?
Yes No
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