In a sample of 44 water specimens taken from a construction site, 27 contained detectable levels of lead.  Construct an  80%  confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places

Find the critical value tc for a 95% confidence level when the sample size is 18. Use Table 4 on page A10 (Appendix)   A. 1.740   B. 2.110   C. 2.101   D. 1.734

You measure 43 dogs' weights, and find they have a mean weight of 34 ounces. Assume the population standard deviation is 13.8 ounces. Based on this, construct a 95% confidence interval for the true population mean dog weight.Give your answers as decimals, to two places

If n=28, I(x-bar)=35, and s=3, find the margin of error at a 95% confidence level Give your answer to two decimal places. Ouestion Heln:

You measure 25 turtles' weights, and find they have a mean weight of 46 ounces. Assume the population standard deviation is 3.2 ounces. Based on this, construct a 99% confidence interval for the true population mean turtle weight.Give your answers as decimals, to two places

Find the following. Enter your answer rounded to at least two decimals. z a/2 for the 97% confidence interval

If n=17, x bar = 39, and s=8, find the margin of error at a 99% confidence level.  Give the answer to two decimal places.

A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 respondents, 13% chose chocolate pie, and the margin of error was given as ±4 percentage poits. Describe what is meant by the statement that "the margin of error was given as ±4 percentage points." (...) Choose the correct answer below. OA. The statement indicates that the study is only 4% confident that the true population percentage of people that prefer chocolate pie is exactly 13%. OB. The statement indicates that the study is 100% -4% = 96% confident that the true population percentage of people that prefer chocolate pie is 13%. OC. The statement indicates that the interval 13% ± 4% is likely to contain the true population percentage of people that prefer chocolate pie. D. The statement indicates that the true population percentage of people that prefer chocolate pie is in the interval 13% ± 4%.

If n=11, 7(x-bar)=45, and s=5, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.

If n=200 and X=70, construct a 99% confidence interval estimate for the population proportion. SAS (Round to four decimal places as needed.)