Suppose a certain Statistics instructor wants to estimate the proportion of students that cheat on  exams. What sample size must be obtained in order to be 95% confident that the population proportion,  p, is within a margin of error of at most 0.02 from the estimate, ?̂. No prior estimate is given for the  proportion.

You are told that the proportion of those who answered "no" to a political survey is 0.60, and that the standard error is 0.0346. The sample size    a  is 50  b is 200  c is 100.  d cannot be determined from the information given.  e is 199

Listed below are the errors between the predicted temperatures and actual temperatures of a certain city. Find the mean and median for each of the two samples. Do the means and medians indicate that the temperatures predicted one day in advance are more accurate than those predicted 5 days in advance, as we might expect? (actual high)- (predicted high 1 day earlier) (actual high)- (predicted high 5 days earlier) 1 0. - 1 - 1 3 1 1 1 -5 -3 2 The mean difference between actual high and the predicted high one day earlier is (Type an integer or decimal rounded to the nearest tenth as needed.) The median difference between actual high and the predicted high one day earlier is (Type an integer or decimal rounded to the nearest tenth as needed.) The mean difference between actual high and the predicted high five days earlier is (Type an integer or decimal rounded to the nearest tenth as needed.) The median difference between actual high and the predicted high five days earlier is n (Type an…

A recent study indicated that 27% of the 100 women over age 55 in the study were windows. How large a sample must you take to be 90% confident that the estimate is within 5% of the true proportion of women over age 55 who are widows?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.The National Council of Small Businesses is interested in the proportion of small businesses that declared Chapter 11 bankruptcy last year. Since there are so many small businesses, the National Council intends to estimate the proportion from a random sample. Let p be the proportion of small businesses that declared Chapter 11 bankruptcy last year. (a) If no preliminary sample is taken to estimate p, how large a sample is necessary to be 98% sure that a point estimate p̂ will be within a distance of 0.11 from p? (Round your answer up to the nearest whole number.) small businesses(b) In a preliminary random sample of 30 small businesses, it was found that eight had declared Chapter 11 bankruptcy. How many more small businesses should be included in the sample to be 98% sure that a point estimate p̂ will be within a distance of 0.110 from p? (Round your answer up…

The board of examiners that administers the real estate broker's examination in a certain state found that the mean score on the test was 440 and the standard deviation was 72. If the board wants to set the passing score so that only the best 10% of all applicants pass, what is the passing score? Assume that the scores are normally distributed. Round to the nearest whole number.

For a positively skewed distribution with a mean = 20, What is the most probable value of the median?a.  Greater than 20b.  Less than 20c.  20d.  Cannot determined from the information given

For any sample of size 90, the population mean, the mean of the sampling distribution for the sampling mean and the sample mean will all be equal to each other.  Is this true or false

Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old. How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move? The error should be no more than 0.01 with 99% confidence.   Select one: a. 16641 b. 167 c. 1670 d. 6450 e. 65

Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey in order to be 98% confident that the estimated (sample) proportion is within 10percentage points of the true population proportion of customers who are males? z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 Use the table of values above.