E Question Help Use the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4522 patients treated with the drug, 173 developed the adverse reaction of nausea. Construct a 90% confidence interval for the proportion of adverse reactions. a) Find the best point estimate of the population proportion p. 0.038 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E-R (Round to three decimal places as needed.) c) Construct the confidence interval. (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. 90% of sample proportions will fall between the lower bound and the upper bound. O B. One has 90% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. O C. There is a 90% chance that the true value of the population proportion will fall between the lower bound and the upper bound. O D. One has 90% confidence that the sample proportion is equal to the population proportion. (1) More Click to select your answer(s).

In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.05 margin of error and use a confidence level of 99​%. Complete parts​ (a) through​ (c) below.

The EPA tests cars for city miles per gallon (mpg). For one model, a sample of 16 cars were tested for mpg, the results follow.   28 25.7 25.8 28 28.5 29.8 30.2 30.4 26.9 28.3 29.8 27.2 26.7 27.7 29.5 28 1) What is point estimate of the mean mpg?

Explain how to find the critical values for a​ t-distribution.   LOADING... Click the icon to view the​ t-distribution table.       Question content area bottom Part 1 Give the first step. Choose the correct answer below.     A. Identify the level of significance 1−α and the degrees of​ freedom, d.f.=n.   B. Identify the level of significance α and the degrees of​ freedom, d.f.=n−1.   C. Identify the level of significance α2 and the degrees of​ freedom, d.f.=n−1.   D. Identify the level of significance 1−α2 and the degrees of​ freedom, df=n

In a survey, 22 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and standard deviation of $14. Construct a confidence interval at a 95% confidence level. Give your answers to one decimal place. H Interpret your confidence interval in the context of this problem.

People were polled on how many books they read the previous year. Initial survey results indicate that s = 11.9 books. Complete parts (a) through (d) below. A Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 95% confidence? This 95% confidence level requires subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 95% confidence? This 95% confidence level requires subjects. (Round up to the nearest subject.) (c) What effect does doubling the required accuracy have on the sample size? O A. Doubling the required accuracy nearly halves the sample size. O B. Doubling the required accuracy nearly doubles the sample size. O C. Doubling the required accuracy nearly quarters the sample size. O D. Doubling the required accuracy nearly quadruples the sample size. (d)…

You are a researcher studying the antler size of male Alaskan Moose in a certain Alaska location.  You gather a random sample of 18 male moose and record the width (in feet) of the antlers. The data is displayed in the table below.  Estimate the mean antler width of all Alaskan male moose in this area.  Use a 90% confidence level.   3.6 5.6 3.4 3.4 4 5.2 4.6 4.3 4.6 4.6 2.2 6.4 3.6 3.1 5.4 4.4 3.3 4.3       a)  Find the confidence interval:   < μμ <   b) What is the margin of error of your interval?  c) Interpret your 90% confidence interval in context.