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

Author Question: A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. ... (Read 125 times)

jenna1

  • Hero Member
  • *****
  • Posts: 568
A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is known that the standard deviation of the population is 22 mph. If the sample size was 100 (other factors remain unchanged), the interval for  would
 a. not change
  b. become narrower
  c. become wider
  d. become zero

Question 2

A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is known that the standard deviation of the population is 22 mph. The 96.6 confidence interval for  is
 a. 63.00 to 67.00
  b. 60.76 to 69.24
  c. 61.08 to 68.92
  d. 60.00 to 80.00



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mcarey591

  • Sr. Member
  • ****
  • Posts: 365
Answer to Question 1

C

Answer to Question 2

B




jenna1

  • Member
  • Posts: 568
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it


nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

For a complete list of videos, visit our video library