Question: A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx= 820 and the sample standard

A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx= 820 and the sample standard deviation iss= 25. UseAppendix Dto find the values of Student'st.

(a)Construct an interval estimate ofwith 99% confidence.(Round your answers to 3 decimal places.)

The 99% confidence interval is from__to___

(b)Construct an interval estimate ofwith 99% confidence, assuming thats= 50.(Round your answers to 3 decimal places.)

The 99% confidence interval is from__to__

(c)Construct an interval estimate ofwith 99% confidence, assuming thats= 100.(Round your answers to 3 decimal places.)

The 99% confidence interval is from__to_

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

A random sample of 10 items is drawn from a population whose standard deviation is unknown. The sample mean is x-bar = 270 and the sample standard deviation is s = 20. Use Appendix D to find the...

A random sample of 25 items is drawn from a population whose standard deviation is known to be = 40. The sample mean is x-bar = 270. a. Construct an interval estimate for with 95 percent confidence....

Random samples of size 64 are drawn from the population in Example 2. Find the mean and standard deviation of the sampling distribution of sample means. Then sketch a graph of the sampling...

A random sample of 8 observations was drawn from a normal population. The sample mean and sample standard deviation are x = 40 and s = 10. a. Estimate the population mean with 95% confidence. b....

The file P07_02.xlsx contains data on the 1995 students who have gone through the MBA program at State University. You can consider this the population of State Universitys MBA students. a. Find the...

Referring to Exercise 8.1: a. How is the distribution of the sample height data on p. 344 related to: (1) The distribution of the population? (2) The sampling distribution of sample means? b. Using...

The file DVD Movies.xlsx contains a large data set of 10,000 customer transactions for a fictional chain of video stores in the United States. Each row corresponds to a different customer and lists...

According to Nielsen Media Research, the average number of hours of TV viewing per household per week in the United States is 50.4 hours. Suppose the standard deviation is 11.8 hours and a random...

Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 22, 18, 14, 25, 17, 28, 15, 21. a. Calculate the sample mean and the sample...

Suppose a random sample of 137 households in Detroit was selected to determine the average annual household spending on food at home for Detroit residents. The sample results are contained in the...

Covered interest arbitrage. Assume information: a) the following Current spot rate of New Zealand dollar = $.41 Forward rate of New Zealand dollar for 360-day (1 year) delivery = $.43 Annual interest...

Discuss two reasons grievances might be filed, furnishing examples of these reasons other than those found in the text?

Explain the evaluation question(s) (i.e., area of need or issue) you would like to focus on using an interview-administered survey instrument that aligns with the goals presented. Evaluate the...

Oust the Turtle Company has the following balances on December 31, 2020: Cash on hand 4,500.00 Cash in bank A 33,000.00 Cash in bank X 50,000.00 Cash in bank C 822,999.72 Cash on hand includes $ 3....