8.2.27 Question Help o What sample size is needed to estimate a population mean within 50...
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal distribution given n = 100, o = 133, and x = 1,500 The 95% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.) 8.1.14-T Question Help As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage for their vehicles. A simple...
6.1.31 Question Help | * Find the minimum sample size n needed to estimate μ for the given values of c, σ, and E. cz 0.98, ơ-7.7, and E: 1 Assume that a preliminary sample has at least 30 members. n(Round up to the nearest whole number.) 6.1.47 Question Help People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book...
8.2.29 Question Help A manager wishes to estimate a population mean using a 95% confidence interval estimate that has a margin of error of +49.0. If the population standard deviation is thought to be 680, what is the required sample size? The sample size must be at least (Round up to the nearest whole number.)
E 8.2.28-T Question Help An advertising company wishes to estimate the mean household income for all single working professionals who own a foreign automobile. If the advertising company wants a 95% confidence interval estimate with a margin of error of 42700, what sample size is needed if the population standard deviation is known to be $29,6007 The sample size must be at least (Round up to the nearest whole number)
Please show your work........................... 16. The sample size needed to estimate a population mean to within 50 units was found to be 97. If the population standard deviation was 250, then the confidence level used was a. 90% b. 95% c. 9996 d. None of these choices.
Need help with study guide 3. The sample size needed to estimate a population mean within 2 units with a 95% confidence when the population standard deviation equals 8 is a. 9 b. 61 c) 62 d. 8
ats 6.1.47 Question Help k Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and a = 12.9. Assume the population is normally distributed A 95% confidence level requires a sample size of I (Round up to the nearest whole number as needed.) th Contents
The sample size needed to estimate a population mean to within 10 units was found to be 68. If the population standard deviation was 50, then the confidence level used was: Selected Answer: c. 0.9 Answers: a. 0.99 b. 0.95 c. 0.9 d. 0.85
Construct the confidence interval for the population mean μ c: 0.95, x-16.8, σ: 9.0, and n-100 A 95% confidence interval for μ is OD (Round to one decimal place as needed.) 6.1.27 Use the confidence interval to find the margin of error and the sample mean (1.58,2.06) The margin of error is (Round to two decimal places as needed) 6.1.31 Find the minimum sample size n needed to estimate μ for the given values of c, o, and E. cz...
Question Help A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.19 inch. (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 0.6 inch (b) The sample mean is 25.9 inches. With a sample size of 75, a 99% level of confidence, and a population standard deviation of 0.6 inch, does it seem possible that the population mean could be less...