Question

In: Math

A psychologist specializing in marriage counseling claims that, among all married couples, the proportion p for...

A psychologist specializing in marriage counseling claims that, among all married couples, the proportion p for whom her communication program can prevent divorce is at least 76%. In a random sample of 225 married couples who completed her program, 168 of them stayed together. Based on this sample, can we reject the psychologist's claim at the 0.05 level of significance?Perform a one-tailed test. Then fill in the table below.Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)

The null hypothesis:

H0:

The alternative hypothesis:

H1:

The type of test statistic: (Choose one)ZtChi squareF
The value of the test statistic:
(Round to at least three decimal places.)
The p-value:
(Round to at least three decimal places.)
Can we reject the psychologist's claim that the proportion of married couples for whom her program can prevent divorce is at least

76%

?
Yes No

Solutions

Expert Solution

No.We can't reject the psychologist's claim that the proportion of married couples for whom her program can prevent divorce is at least 76%.


Related Solutions

A psychologist specializing in marriage counseling claims that, among all married couples, the proportion p for...
A psychologist specializing in marriage counseling claims that, among all married couples, the proportion p for whom her communication program can prevent divorce is at least 77%. In a random sample of 240 married couples who completed her program, 176 of them stayed together. Based on this sample, can we reject the psychologist's claim at the 0.05 level of significance?Perform a one-tailed test. Then fill in the table below.Carry your intermediate computations to at least three decimal places and round...
Twenty years ago, a very famous psychologist specializing in marriage counseling authored a book detailing the...
Twenty years ago, a very famous psychologist specializing in marriage counseling authored a book detailing the way in which she believed spouses should communicate. She is now interested in the proportion of all couples who bought her book who stayed together. For a random sample of 200 couples who bought her book, she found that 166 of them stayed together. Based on this, compute a 95% confidence interval for the proportion of all couples who bought her book who stayed...
Imagine that proportion p = 0.82 of adults in a large city are married, but that...
Imagine that proportion p = 0.82 of adults in a large city are married, but that this is not known, and we would like to estimate p. Suppose that we survey a random sample of 250 adults in the city, and calculate ˆp, the sample proportion of respondents who are married. (a) Are the requirements met for ˆp to be approximately normally distributed? Explain, showing any necessary calculations and/or computer commands. (b) What is (approximately) the probability that ˆp will...
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to...
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 60%. If 118 out of a random sample of 225 college students expressed an intent to vote, can we reject the aide's estimate at the 0.05 level of significance? Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in...
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to...
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 70%. If 158 out of a random sample of 235 college students expressed an intent to vote, can we reject the aide's estimate at the 0.1 level of significance?Perform a one-tailed test. Then fill in the table below.Carry your intermediate computations to at least three decimal places and round your answers as specified in the table....
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to...
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at most 75 % . If 217 out of a random sample of 270 college students expressed an intent to vote, can the aide's estimate be rejected at the 0.05 level of significance? Perform a one-tailed test. Then fill in the table below. Null Hypothesis Alternative Hypothesis type of test statistic Value of the test statistic the critical...
True/False All married couples qualify for the unlimited marital deduction As long as the surviving spouse...
True/False All married couples qualify for the unlimited marital deduction As long as the surviving spouse is one of the individuals possessing a GPOA over a trust, the trust assets will qualify for the unlimited marital deduction. Once Portability was added to the Internal Revenue Code, the surviving spouse automatically receives the lesser of a) the maximum Unified Credit or b) the Unified Credit less the Estate Tax Liability.
One urban affairs sociologist claims that the proportion, p, of adult residents of a particular city...
One urban affairs sociologist claims that the proportion, p, of adult residents of a particular city who have been victimized by a criminal is at least 55%. A random sample of 245 adult residents of this city were questioned, and it was found that 119 of them had been victimized by a criminal. Based on these data, can we reject the sociologist's claim at the level of 0.05 significance? Perform a one-tailed test. Then fill in the table below.
A random sample of medical files is used to estimate the proportion p of all people...
A random sample of medical files is used to estimate the proportion p of all people who have blood type B. (a) If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate p̂ will be within a distance of 0.06 from p? (Round your answer up to the nearest whole number.) medical files (b) Answer part (a) if you use the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT