Answered: A marriage counselor has traditionally…

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

See similar textbooks

Related questions

Question

A marriage counselor has traditionally seen that the proportion

of all married couples for whom her communication program can prevent divorce is

79%

. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than

79%

of married couples. In a random sample of

245

married couples who completed her program,

199

of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor’s claim at the

0.05

level of significance?

Perform a one-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 critical value. (Round to three or more decimal places.)

(e)	Is there enough evidence to support the marriage counselor's claim that the proportion of married couples for whom her program can prevent divorce is more than 79% ?
Yes No