Question: a. A statistics practitioner randomly sampled 1,500 observations and found x = 14 and s = 25. Test to determine whether there is enough evidence

a. A statistics practitioner randomly sampled 1,500 observations and found x̄ = 14 and s = 25. Test to determine whether there is enough evidence at the 5% significance level to infer that the population mean is less than 15.

b. Repeat part (a) assuming that you know that the population standard deviation is σ = 25.

c. Explain why the conclusions produced in parts (a) and (b) are virtually identical.

Step by Step Solution

★★★★★

3.38 Rating (170 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

H 0 15 H 0 15 a Rejection region 1645 pvalue 0608 There is not enough evidence ... View full answer

Question Has Been Solved by an Expert!

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

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

398-M-S-O-T-P (19).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

Compute the cost of a 16% coupon, 4 year maturity bond issue of 600.000. The bonds were sold at 8 % discount and the flotation costs amounted to 5 % of total nominal value. Repayment will be made in...

A study was made to determine whether there is a difference between the proportions of parents in the states of Maryland (MD), Virginia (VA), Georgia (GA), and Alabama (AL) who favor placing Bibles...

A manufacturing company wants to determine whether there is a difference between the variance of the number of units produced per day by one machine operator and the similar variance for another...

3. A statistics practitioner randomly sampled 1 500 observations with a mean of 14 and standard deviation of 25. Test whether there is enough evidence to infer that the population mean is different...

Exam 2 Statistical Analysis Part 1 of 1 - Question 1 of 20 5.0/ 100.0 Points 0.0/ 5.0 Points The stacked bar chart below shows the percentages of death due to cancer in four geographic regions of the...

Hours on-line (x) 0 7 5 2 3 5 1 3 5 10 7 6 Test scores (y) 96 75 84 82 74 76 85 95 68 50 65 58 (a) Is there a positive, negative or no relationship between the number of hours spent online and the...

of 2 - 17.5/ 50.0 Points 2.5/ 2.5 Points Question 1 of 40 A consumer group claims that the mean running time for a certain type of flashlight battery is not the same as the manufacturer's claims....

1 of 40 0.0/ 2.5 Points A researcher wants to check the claim that convicted burglars spend an average of 18.7 months in jail. She takes a random sample of 35 such cases from court files and finds...

1 (Use MegaStat to answer this question) After the solution copy and pase the MegaStat output. A real estate agent claims that the mean price of houses is different from 17.8 thousand dollars. To...

Question 1 : QUESTION 1 A real estate agent claims that the mean price of houses is different from 17.8 thousand dollars. To check this claim, the prices of a random sample of 18 newly sold houses...

A sample of eight observations of variables x (years of experience) and y (salary in $1,000s) is shown below: 3 7 4 y 20 23 15 11 27 21 17 14 Calculate and interpret the covariance between x and y....

Write a short note on European infrastructure (from ancient times to modern times)

What is a total rewards approach?

Too many managers today have forgotten that work should be inspiring and fun and are too out of touch with what makes people productive. How would you respond to this assertion?

The postanesthesia care area (recovery room) at St. Lukes Hospital in Maumee, Ohio, was recently enlarged. The hope was that with the enlargement the mean number of patients per day would be more...

www.golfsmith.com receives an average of 6.5 returns per day from online shoppers. For a sample of 12 days, it received the following numbers of returns. At the .01 significance level, can we...

During recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasts 3 hours and 30 minutes. A sample of 17 games revealed the...

Bond Prices over Time and Bond Return You want to buy a Disney bond with four years until maturity and a coupon rate of 9.75% per year, paid semiannually. FED reports that the market interest rate...

Can anyone help me please? Instructions: Use technology to find statistical measures. Round to the nearest hundredth. Data Set: 54. 88, 49, 44, 96, 72, 46, 58, 79 92. 44, 50, 102, 80, 72, 66, 64, 61...

Cooke Co. is comparing two different capital structures. Plan I would result in 8,700 shares of stock and $323,000 in debt. Plan II would result in 12,000 shares of stock and $210,800 in debt. The...