SOLUTION: The depot is using a standard of 635 hours for a particular modification effort. You are to review the standard and determine whether it should be revised. After sampling 20 of th

Question 722142: The depot is using a standard of 635 hours for a particular modification effort. You are to review the standard and determine whether it should be revised. After sampling 20 of these modifications you calculate a mean of 665 hours and a standard deviation of 45 hours. We are concerned that the hours might be higher or lower than the 635 hour standard. Test the standard at the .10 level of significance. Select the correct answer out of each pair of choices. (Carry intermediate calculations to three decimal places.)

The tp is 1.328

The tp is 1.729

The tc is 2.981

The tc is 13.333

We would reject the null hypothesis

We would fail to reject the null hypothesis

We would recommend using the existing standard.

We would recommend revising the standard.

Answer by lynnlo(4176) (Show Source): You can put this solution on YOUR website!

RELATED QUESTIONS
1) The depot is using a standard of 635 hours for a particular modification effort. You... (answered by Boreal)

The depot is using a standard of 635 hours for a particular modification effort. You are... (answered by stanbon)

The depot is using a standard of 635 hours for a particular modification effort. You... (answered by lynnlo)

The depot is using a standard of 635 hours for a particular modification effort. You are... (answered by psbhowmick)

The depot is using a standard of 650 hours for a particular modification effort. You are... (answered by rothauserc)

Invoices at a particular depot have amounts, which follow a Normal distribution with a... (answered by ewatrrr)

4. In tests of a computer component, it is found that the mean time between failures is... (answered by stanbon)

A mobile phone manufacturer is promoting a new mobile because of its excellent battery... (answered by Boreal)

You have a coffee shop where you have averaged 50 cups of sales per hour with a standard... (answered by stanbon)