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

Author Question: The average time taken to complete an exam, X, follows a normal probability distribution with mean = ... (Read 57 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
The average time taken to complete an exam, X, follows a normal probability distribution with mean = 60 minutes and standard deviation 30 minutes. By what time should 99 of the students have finished the exam? (i.e. What is the 99th percentile for X?)
 a. 85.2 minutes
  b. 89.4 minutes
  c. 129.9 minutes
  d. 150.0 minutes

Question 2

A randomly selected sample of 30 students spent an average amount of 40.00 on a date, with a standard deviation of 5.00 . The standard error of the sample mean is
 a. 0.063
  b. 0.167
  c. 0.913
  d. 5.000



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stano32

  • Sr. Member
  • ****
  • Posts: 339
Answer to Question 1

C

Answer to Question 2

C




plus1

  • Member
  • Posts: 676
Reply 2 on: Jul 24, 2018
YES! Correct, THANKS for helping me on my review


vickybb89

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

For a complete list of videos, visit our video library