Week 6 Assignment: Estimating Sample Size for a Population Proportion Question Suppose an automotive repair company...
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 95% confident that the estimated (sample) proportion is within 10 percentage points of the true population proportion of customers who are males? z0.10:1.282 z0.05: 1.645 z0.04: 1.751 z0.025: 1.960 z0.01: 2.326 z0.005: 2.576 Use the table of values above. Provide your answer below:
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 99% confident that the estimated (sample) proportion is within 7 percentage 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. Provide your answer below:
(1 point) A. Determine the sample size required to estimate a population proportion to within 0.032 with 99% confidence, assuming that you have no knowledge of the approximate value of the sample proportion. Sample Size = B. Repeat the previous problem, but now with the knowledge that a prior study found a sample proportion of approximately 0.33. Sample Size = Note: The table in Sullivan that gives values for ??/2zα/2 is not accurate. Make sure to use the following values...
Week 6 Assignment: Confidence Interval for Population Mean- Population Standard Deviation Known Question supplement bottle is 16 pills. If we want to be 95 % confident The population standard deviation for the number of pills that the sample mean is within 5 pills of the true population mean, what is the minimum sample size that should be taken? in a Zo,01 Z0,005 Zo.10 Zo.05 Zo025 2.576 2.326 1.645 1.960 1.282 Use the table above for the z-score, and be sure...
9.2.17 Question Help A simple random sample of size nis drawn from a population that is normally distributed. The sample mean, X, is found to be 106, and the sample standard deviations, is found to be 10. (a) Construct a 96% confidence interval about if the sample size, n, is 17 (b) Construct a 96% confidence interval about if the sample size, n, is 22 (c) Construct a 98% confidence interval about if the sample size, n, is 17 id...