In a recent survey of 4276 randomly selected households showed that 3549 of them had telephones....

In a recent survey of 4276 randomly selected households showed that 3549 of them had telephones. Using these results, construct a 99% confidence interval estimate of the true proportion of households with telephones. Use the PANIC acronym

Expert Solution

We have given here,

x=3549
n=4276
Estimate for sample proportion

Level of significance is =1-0.99=0.01
Z critical value(using Z table)=2.576

orchestra answered 2 years ago

A recent survey of 200 households in the United States showed that 8 had a single...

A recent survey of 200 households in the United States showed that 8 had a single male as the head of household. A survey of 150 households in Canada showed that 5 had a single male as the head of household. At α =.05, can it be concluded that the proportion in the two countries is different?

A recent survey showed that among 700 randomly selected subjects who completed 4 years of college,...

A recent survey showed that among 700 randomly selected subjects who completed 4 years of college, 151 smoke and 549 do not smoke. Determine a 95% confidence interval for the true proportion of the given population that smokes. 95% CI: to

A recent survey of 2,000 randomly selected U.S. residents asked whether or not they had used...

A recent survey of 2,000 randomly selected U.S. residents asked whether or not they had used the Internet for making travel reservations. There were 1,100 people who answered “yes,” and the remainder answered “no.” Let X be the number of people who answered “yes." Estimate the proportion p from this information. Then calculate the probability that X is less than 1,050. a. 0.0014 b. 0.5500 c. 0.0131 d. 0.0117 e. 0.9869

Three randomly selected households are surveyed as a pilot project for a larger survey to be...

Three randomly selected households are surveyed as a pilot project for a larger survey to be conducted later. The numbers of people in the households are 2, 4, and 10. Consider the values of 2, 4, and 10 to be a population. Assume that samples of size n = 2 are randomly selected with replacement from the population of 2, 4, and 10. The nine different samples are as follows: (2, 2), (2, 4), (2, 10), (4, 2), (4, 4),...

A) In 1997, a survey of 820 households showed that 137 of them use e-mail. Use...

A) In 1997, a survey of 820 households showed that 137 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this information to answer the following questions. What is the P-value? B) In a study of 420,149 cell phone users, 115 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected...

A sample survey of 36 randomly selected households shows that the median household income of the...

A sample survey of 36 randomly selected households shows that the median household income of the eastern NC residents is $51,000, with a standard deviation of $1075. Test the (null) hypothesis that the actual (real) median household income is $52,752 at 0.05% confidence level.

In? 1997, a survey of 840 households showed that 147 of them use? e-mail. Use those...

In? 1997, a survey of 840 households showed that 147 of them use? e-mail. Use those sample results to test the claim that more than? 15% of households use? e-mail. Use a 0.05 significance level. Use this information to answer the following questions. a. Which of the following is the hypothesis test to be? conducted? b. What is the test? statistic? c. What is the? P-value? d. What is the? conclusion? There is not sufficient evidence to support the claim...

In 1997, a survey of 860 households showed that 161 of them use e-mail. Use those...

In 1997, a survey of 860 households showed that 161 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. What is the P-Value?

A recent survey of 200 companies showed that 8 had a female as the head of...

A recent survey of 200 companies showed that 8 had a female as the head of the company. A year ago, a survey of 200 companies showed that 6 had a female as the head of the company. At α = 0.05, can it be concluded that the proportion has changed? Find the 95% confidence interval of the difference of the two proportions.

In a survey of 356 randomly selected gun owners, it was found that 82 of them...

In a survey of 356 randomly selected gun owners, it was found that 82 of them said they owned a gun primarily for protection. Find the margin of error and 95% confidence interval for the percentage of all gun owners who would say that they own a gun primarily for protection. Round all answers to 3 decimal places. Margin of Error (as a percentage): % Confidence Interval: % to %

Question