Suppose you construct a 90% confidence interval for the true population mean GPA of students at Taft College. If all of the sample values remained constant and you decreased the confidence level, what would happen to the width of your confidence interval? Edit View Incort

If n = 28, a = 37, and s = 6.2, construct a confidence interval at a 97% confidence level. Assume the data came from a normally distributed population. Give your answers to 3 decimal places.

What does Level of Confidence indicates?

A recent survey of 120 individuals revealed that 50 thought they were worse off financially than a year ago. Find a 90% confidence interval for the true proportion of individuals that feel they are worse off financially. PLEASE show work thank you

Scott wants to find a 95% confidence interval for the average GPA for Allegany College of Maryland students. He gets the records for 89 students. The results were roughly bell-shaped with a mean of 2.4 and standard deviation of 0.7. Construct a 95% confidence interval in the form: Estimate + margin of error.

Explain when you would use the z value or the t-value to calculate a confidence interval

Convert the estimate and your confidence interval to Percents. Discuss reasons the estimate might be biased.

A study found a confidence interval on the proportion of children that are hearing impaired was 0.04 to 0.16.  #1  What is p-hat in this study?  #2  What is the margin of error for this confidence interval?

this solution is incorrect since the  confidence level is 90% margin of error is 3%

A researcher wanted to compare the percentages of men and women who play the lottery.  They randomly sampled 300 women and found that 66 of them play the lottery.  In a random sample of 500 men, they found that 160 of them play the lottery.  Construct a 90% confidence interval for the difference in the percentage of women and men who play the lottery. Find the point estimate. Find the margin of error. Interpret the confidence interval in terms of this problem.