Question: Thequality-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

Thequality-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 7,499 hours. The population standard deviation is 700hours. A random sample of 49 light bulbs indicates a sample mean life of 7,349 hours.

a. At the 0.05 level ofsignificance, is there evidence that the mean life is different from 7,499hours?

b. Compute thep-value and interpret its meaning.

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

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

**Just need help with constructing the confidence intervals please**

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!

Thequality-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 7,501 hours. The population standard...

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 7,473 hours. The population standard...

If, in a (two-tail) hypothesis test, the p-value is 0.1116, what is your statistical decision if you test the null hypothesis at the 0.06 level of signicance? E> Choose the correct answer below? 0 A....

Instructions for Students: Answer ONLY part a in Question 4. Questions carry equal marks. You have to show the work to earn marks. Answers must be uploaded on Moodle under Assignment II. Unless...

If, in a (two-tail) hypothesis test, the p-value is 0.1116, what is your statistical decision if you test the null hypothesis at the 0.06 level of significance? . . . Choose the correct answer below?...

question 1: part A question 2: part A question 3: part A question 4: part A question 5: part A question 6: part A question 7: part A A bottled water distributor wants to determine whether the mean...

1.If, in a (twotail) hypothesis test, the pvalue is 0.0081, what is your statistical decision if you test the null hypothesis at the 0.01 level of significance? Choose the correct answer below?...

The TTC has set a bus mechanical reliability goal of 3,800 bus miles. Bus mechanical reliability is measured specifically as the number of bus miles between mechanical road calls. Suppose a sample of...

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 7,543 hours. The population standard...

A tennis ball is dropped from a height of 10.0 m. It rebounds off the floor and comes up to a height of only 4.00 m on its first rebound. (Ignore the small amount of time the ball is in contact with...

Consider a problem of testing hypotheses in which the following hypotheses about an arbitrary parameter are to be tested: H0: 0, H1: 1. Suppose that is a test procedure of size (0

The comparative balance sheets for Bramble Company as of December 3 1 are as follows. \ table [ [ \ table [ [ BRAMBLE COMPANY ] , [ Comparative Balance Shects December 3 1 ] ] ] , [ Assets , 2 0 2 2...

A company is preparing completing their Cash Budget. The following data has been prepared for cash receipts and payments. January February March Cash receipts $1,061,200 $1,182,400 $1,091,700 Cash...