In a survey, the planning value for the population proportion is p*=0.25 . How large a sample should be taken to provide a 95% confidence interval with a margin of error of 0.08 ? Round your answer to next whole number. _____

A marine biologist would like to estimate the mean weight of all mahi mahi on the Treasure Coast, using a 99% confidence interval. The standard deviation of the weights of all mahi mahi on the Treasure Coast is known to be 8.2 pounds. How large a sample of mahi mahi should the marine biologist select so that the estimate is within 0.88 pounds of the true population mean. Round the solution up to the nearest whole number.  n=

From a sample of 30 graduate students, the mean number of months of work experience prior to entering an MBA program was 33.93. The national standard deviation is known to be 17 months. What is a 90% confidence interval for the population mean? A 90% confidence interval for the population mean is || | (Use ascending order. Round to two decimal places as needed.) View an Example Get More Help - Clear All Check Answs Help Me Solve This earch acer

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Please help me solve step by step using a ti84 plus calculator, with all functions used. Please write legibly. Thanks!

How large a sample should be selected to provide a 95% confidence interval with a margin of error of 9? Assume that the population standard deviation is 10. Round your answer to next whole number.

We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately �=76.4. We would like to be 95% confident that the estimate is within 0.5 of the true population mean. How large of a sample size is required?�=

Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96

Which of the following would result in the widest confidence interval? A sample size of 30 with 95% confidence. A sample size of 100 with 95% confidence A sample size of 100 with 99% confidence. A sample size of 30 with 99% confidence.