(Answered) The quality control manager at a compact fluorescent light

Statistics

The quality control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7.500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLd indicates a sample mean life of 7,250 hours. The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours.

a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,500 hours?

b. Compute the p- value and interpret its meaning.

c. Construct a 95% confidence interval estimate of the population mean life of the CFLs.

d. Compare the results of (a) and (c). What conclusions do you reach?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91668920
Price:- $10

Verified Expert

Priced at $20 Now at $10, Verified Solution

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Stock valuation gruber corp pays a constant 9 dividend on

Stock Valuation Gruber Corp. pays a constant $9 dividend on its stock. The company will maintain this dividend for the next 12 years and will then cease paying dividends forever. If the required return on this stock is 1 ...

Deyoung entertainment enterprises is considering replacing

DeYoung Entertainment Enterprises is considering replacing the latex molding machine it uses to fabricate rubber chickens with a newer, more efficient model. The old machine has a book value of $450,000 and a remaining u ...

Sixty-seven percent of adults have looked at their credit

Sixty-seven percent of adults have looked at their credit score in the past six months. If you select 31 customers, what is the probability that at least 20 of them have looked at their score in the past six months?

According to a research institution the average hotel price

According to a research? institution, the average hotel price in a certain year was ?$95.36. Assume the population standard deviation is ?$20.00 and that a random sample of 42 hotels was selected. a. Calculate the standa ...

Can someone help me determine how 1107 was obtainedin order

Can someone help me determine how 11.07 was obtained? In order to determine the Chi-Square Critical for the Chi-Square. You need to find out the Degrees of Freedom (DF) DF = (Number of Rows - 1 * Number of Columns - 1) ...

Cash flowsnbspnbspit is typical for jane to plan monitor

Cash flows It is typical for Jane to plan, monitor, and assess her financial position using cash flows over a given period, typically a month. Jane has a savings account, and her bank loans money at 6% per year while it ...

On the production line the company finds that 956 of

On the production line the company finds that 95.6% of products are made correctly. You are responsible for quality control and take batches of 30 products from the line and test them. What number of the 30 being incorre ...

Forty-nine percent of us teens have heard of a fax machine

Forty-nine percent of US teens have heard of a fax machine. You randomly select 12 US teens. Find the probability that the number of these selected teens that have heard of a fax machine is exactly six (first answer list ...

A group of students made the following scores on a 10-item

A group of students made the following scores on a 10-item quiz in psychological statistics: {5, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10} What is the variance, treating these scores as a sample?

At station a the egg hatch rate computed from a set of 100

At station A, the egg hatch rate (computed from a set of 100 eggs at a time) is known to follow approximately a normal distribution with mean 62% and standard deviation 5%. At station B, the egg hatch rates are known to ...

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