To find the 95 percent confidence interval for mean

Reference no: EM1319158

To find the 95 percent confidence interval for mean.

A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620. The population standard deviation is found to be 60. The formula for a 95% confidence interval yields the interval 640 ± 5.88. Determine whether each of the following statements is true or false.

a. The interval is incorrect. It is much too narrow.

b. If we repeated this procedure many, many times, X-bar would fall between 634.102 and 645.808 about 95 percent of the time.

Reference no: EM1319158

Questions Cloud

Scatter plot for variation in starting salaries : Based on this sample information find out what percent of variation in starting salaries is described by GPA, and find out the equation that would forecast salary from GPA. Give a scatter plot.

Testing for one sample population proportion : What decision should be made regarding the null hypothesis?

Implementing the code : Write down a complete program which declares an integer variable, reads a value from the keyboard into that variable. Write down a program which determines the mileage reimbursement for the salesperson at a rate of $.35 per mile.

Chain store representative was overlooking : Illustrate what did he know about costing to the chain store representative was overlooking. Be sure to describe or chart the shape of Morita's costing.

To find the 95 percent confidence interval for mean : A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620. The population standard deviation is found to be 60. The formula for a 95% confidence interval yields th..

Importance of sales process in lodging industry : Explain the importance of the sales process in the lodging industry. What role does prospecting play in a comprehensive sales and marketing plan? How can a lodging operation use prospecting as a sales tool?

Critical value for one sample t-test : For what value of t will the null hypothesis not be rejected?

Economy for latest commercial equipment has dropped : The economy for latest commercial equipment has dropped in the last seven quarters. You require a latest niche. You are the CEO. You will not fire anyone.

Describing difference in variances : At α = .05, is there a difference in variances? Illustrate all steps clearly, including illustration of the decision rule.

User Account

All Pages