For a confidence level of 99% with a sample size of 11, find the critical t value.

For a confidence level of 88%, find the critical Z-value using the standard normal table.

With a large sample (N>30), the Excel function CONFIDENCE.T is used to calculate the confidence interval. True or False

Find the sample size need to estimate the percentage of Californians who are left handed.Use a 3 percentage point margin of error, and a confidence level of 99%. Previous results indicate that about 10% of Californians are left handed. Critical Values: z 0.05= 1.645 z 0.025=1.95 z 0.01= 2.325 z 0.005= 2.575

For a confidence level of 90%, find the critical value. Use 3 decimal places.

A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 2 points with 99% confidence assuming s = 14.8 based on earlier studies? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values. A 99% confidence level requires subjects. (Round up to the nearest subject.)

Please solve for the two value listed.

The confidence level is 99% , o= 4178 thousand dollars, and the histogram of 59 player salaries of football players. Find the critical value za/2 and ta/2

A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s = 17.2 based on earlier studies? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values. A 99% confidence level requires subjects. (Round up to the nearest subject.) A 90% confidence level requires subjects. (Round up to the nearest subject.) How does the decrease in confidence affect the sample size required? O A. The sample size is the same for all levels of confidence. O B. Decreasing the confidence level decreases the sample size needed. OC. Decreasing the confidence level increases the sample size needed.