This topic contains a solution. Click here to go to the answer

Author Question: Solve the problem. Use the critical-value approach.A sheet-metal press stamps out bolt washers with ... (Read 110 times)

dmcintosh

  • Hero Member
  • *****
  • Posts: 517
Solve the problem. Use the critical-value approach.

A sheet-metal press stamps out bolt washers with a nominal inner diameter of 0.25 inches. Measurement of the inner diameters of a random sample of 14 washers produced the following results (in inches):


The normal scores of the data are summarized below:

Using technology, perform the following hypothesis test: at the 1% significance level, determine whether the mean washer diameter for this machine exceeds the nominal value. Comment on the appropriateness of the test.
◦ Test statistic: t = 4.5865; Critical value: 2.650.
Since the test statistic is greater than the critical value, reject the null hypothesis H0: μ = 0.25 inches.
There is sufficient evidence to conclude that the inner diameter is larger than the  nominal value. However, the normal probability plot indicates that the data are not distributed normally, so the t-test may not be appropriate.
◦ Test statistic: t = 2.6503; Critical value: 4.5865.
Since the test statistic is less than the critical value, do not reject the null hypothesis . There is insufficient evidence to conclude that the inner diameter is larger than the  nominal value. The normal probability distribution plot indicates that the t-test is an appropriate test.
◦ Test statistic: t = 4.5865; Critical value: 1.7709.
Since the test statistic is greater than the critical value, reject the null hypothesis H0: μ = 0.25 inches.
There is sufficient evidence to conclude that the inner diameter is larger than the nominal value. However, the normal probability plot indicates that the data are not distributed normally, so the t-test may not be appropriate.
◦ Test statistic: t = 2.6503; Critical value: 4.5865.
Since the test statistic is less than the critical value, do not reject the null hypothesis . There is insufficient evidence to conclude that the inner diameter is larger than the  nominal value. However, the normal probability plot indicates that the data are not distributed normally, so the t-test may not be appropriate.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by dmcintosh on Apr 7, 2020

juiceman1987

  • Sr. Member
  • ****
  • Posts: 316
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 50% of students answer this correctly




dmcintosh

  • Member
  • Posts: 517
Reply 2 on: Apr 7, 2020
Excellent


bigcheese9

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

For a complete list of videos, visit our video library