This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A sample of 30 cookies is taken to test the claim that each cookie contains at least 9 chocolate ... (Read 133 times)

newyorker26

  • Hero Member
  • *****
  • Posts: 536
on: Jun 24, 2018
A sample of 30 cookies is taken to test the claim that each cookie contains at least 9 chocolate chips. The average number of chocolate chips per cookie in the sample was 7.8 with a standard deviation of 3.
 a. State the null and alternative hypotheses.
  b. Using the critical value approach, test the hypotheses at the 5 level of significance.
  c. Using the p-value approach, test the hypothesis at the 5 level of significance.
  d. Compute the probability of a Type II error if the true number of chocolate chips per cookie is 8.

Question 2

A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days. The standard deviation of the population () is known to be 5.6 days.
 a. State the null and alternative hypotheses.
  b. Using the critical value approach, test to determine if their advertisement is legitimate. Let  = .05.
  c. Using the p-value approach, test the hypotheses at the 5 level of significance.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sierrahalpin

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. H0:   9
Ha:  < 9
b. test statistic t = -2.190 < -1.699; reject H0
c. reject H0; the p-value is between .01 to .025
d. A Type II error has not been committed since H0 was rejected.

Answer to Question 2

a. H0:  15
Ha:  > 15
b. test statistic Z = 1.5 < 1.645; therefore do not reject H0
c. Do not reject H0; p-value is (.5 - .4332) = 0.0668


newyorker26

  • Member
  • Posts: 536
Reply 2 on: Jun 24, 2018
Excellent

deja

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Digital rectal exam (DRE). The physician’s index finger is inserted into the rectum and pressed agai Digital rectal exam (DRE). The physician’s index finger is inserted into the rectum and pressed agai
Weber test: Place the base of the tuning fork on top of the client’s head. Weber test: Place the base of the tuning fork on top of the client’s head.
Sample Diet for a College-Aged Female Weighing 132 Pounds, Assuming Light to Moderate Daily ... Sample Diet for a College-Aged Female Weighing 132 Pounds, Assuming Light to Moderate Daily ...
Monitoring and Following Up on Laboratory Test Results Monitoring and Following Up on Laboratory Test Results
Mendel’s test cross to verify independent assortment Mendel’s test cross to verify independent assortment
Video: Stroke volume - afterload definition & hypertension

For a complete list of videos, visit our video library