Consider sample data with   = 16 and   s = 4.  (For each answer, enter an exact number.) (a)  Compute the coefficient of variation (as a percent). 25% (b)  Compute a 75% Chebyshev interval around the sample mean.Lower Limit  Upper Limit     I know how to get part A, but how do you work the second half of this problem?

Please help with calculating the % error. Thank you.

In the book Business Research Methods (5th ed.). Donald R. Cooper and C. William Emory discuss studying the relationship between on-the-job accidents and smoking. Cooper and Emory describe the study as follows: Suppose a manager implementing a smoke-free workplace policy is interested in whether smoking affects worker accidents. Since the company has complete reports of on-the-job accidents, she draws a sample of names of workers who were involved in accidents during the last year. A similar sample from among workers who had no reported accidents in the last year is drawn. She interviews members of both groups to determine if they are smokers or not. The sample results are given in the following table. On-the-Job No 7 Smoker Heavy Moderate Nonsmoker 16 Column total 34 Heavy Moderate Yes Nonsmoker Total 12 6 Expected counts are below observed counts No Accident Total 19 7 9.21 9 Row 1 Row 2 Row 3 Column 1 Column 2 16 32 Accident 12 9.79 6 Accident Row Total 7.27 16 15.52 32 7.73 16…

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.68. You would like to be 97% confident that your estimate is within 2.5% of the true population proportion. How large of sample size is required  n =

Pls refer to image

#1. A baseball team won 9 out of 23 games. What is their winning percentage? #2. Ms. Smith went on a diet and lost 10 pounds which was 6% of her body weight before she started her diet. What was her weight before and after dieting?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.A random sample of 5280 permanent dwellings on an entire reservation showed that 1620 were traditional hogans.

When a woman thinks she may be pregnant, she often uses an over-the-counter pregnancy test to confirm or deny if she is pregnant. The two-way table below represents the results of one brand of pregnancy test on 500 women, some of whom are pregnant and some are not. Round percentage answers to the nearest tenth of a percent to answer the following two questions. Negative Test Result Positive Test Result (a) What is the sensitivity for this test? % Pregnant 66 131 (b) What is the specificity for this test? % Add Work Check Answer Not Pregnant 239 64

What percentage of your campus student body is female? Let p be the proportion of women students on your campus.

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 580 potsherds was found, of which 370 were identified as Santa Fe black-on-white.   (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.)   lower limit       upper limit