Question 1
Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval of a population mean.
A researcher wishes to estimate the mean height of women aged between 60 and 65 in the U.S. She desires a margin of error of 0.1 inches. Past studies suggest that a population standard deviation of
is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated accuracy.
◦ 2178
◦ 66
◦ 4356
◦ 436
Question 2
Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval of a population mean.
A college teacher wishes to estimate the mean number of hours worked per week at non-college related jobs by full-time students at the college. He desires a margin of error of 1.3 hours. Past studies suggest that a population standard deviation of 13.6 hours is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated accuracy.
◦ 219
◦ 438
◦ 569
◦ 21
Relative Size of the Body’s Fluid Compartments
The WISC-IV: Sample Items
Find the final amount if the initial amount is 400 units.
How to find the area of any triangle given its three sides
Use the product rule to find derivative
Use a graphical method to find the length of the loan to the nearest year