A microwave oven repairer says that the mean repair cost, Ask an Expert

Statistics

A microwave oven repairer says that the mean repair cost for damaged microwave oven is less than $90. You work for the repairer and want to test this claim. You find that a random sample of five microwave ovens has a mean repair cost of $87 and a standard deviation of $12.50. At a=0.01, do you have enough evidence to support the repairers claim? Assume the population is normally distributed.

a) Find critical value and identify the rejection region?
To =

b) Find the standardized test statistic?
T =

c) Decide whether to reject or fail the null hypothesis?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9390715

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Question 1a consumer analyst reports that the mean life of

Question 1 A consumer analyst reports that the mean life of a certain type of alkaline battery is no more than 63 months. Write the null and alternative hypotheses and note which is the claim. A)Ho: μ ≤ 63 (claim), Ha: μ ...

How much of the opposing side should you share in a

How much of the opposing side should you share in a presentation to a multiple-perspective audience, and what techniques would you use?

Simone founded her company using 175000 of her own money

Simone founded her company using $175,000 of her own? money, issuing herself 200,000 shares of stock. An angel investor bought an additional 200,000 shares for $125,000. She now sells another450,000 shares of stock to a ...

Interested in learning more about its fans the marketing

Interested in learning more about its fans, the marketing office of the Arena Football League (AFL) conducted a survey at one of its games. The survey had 952 respondents, 679 males and 273 females. Out of the 952 total ...

Suppose that 20 of men p20 and 15 of women p 15 are

Suppose that 20% of men (P=.20) and 15% of women (P= .15) are carriers of a particular genetic trait. That trait can only be inherited by a child if both parents are carriers. What is the probability that a child is born ...

A cpu manufacturing company knows based on the machines

A CPU manufacturing company knows, based on the machines working at maximum productivity, that 90% of the CPU's coming off the line meet quality standards. The quality control inspector pulls 25 CPU's off the line to tes ...

The board of a major credit card company requires that the

The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait is not exceeding the requirement, an assist ...

In a sample of 20 cups of coffee at the local coffee shop

In a sample of 20 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 14.1 degrees. What would be the 95% confidence interval for the temperature of your cup of ...

According to the deloitte ev survey 5 of respondents

According to the Deloitte EV Survey, 5% of respondents indicated that they would be willing to pay an extra $500 or more for an electric vehicle versus one with a gasoline engine. A random sample of 25 adults has been se ...

Thinking specifically about disney theme parks how does

Thinking specifically about Disney theme parks, how does Disney connect with the target market? What are some of the challenges associated with Disney theme parks? Use examples.

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert