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

Author Question: The average time taken to complete an exam, X, follows a normal probability distribution with mean = ... (Read 63 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
on: Jul 24, 2018
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
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

C


plus1

  • Member
  • Posts: 676
Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

meganmoser117

  • Member
  • Posts: 303
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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 ...
Global Distribution of Earthquakes Global Distribution of Earthquakes
Eye exam Eye exam
Normal lab values Normal lab values
Gravitational Force Due to a Distribution of Mass Problem 1 Gravitational Force Due to a Distribution of Mass Problem 1
MATH ODDS AND PROBABILITY PLEASE ANSWER THE PICTURE MATH ODDS AND PROBABILITY PLEASE ANSWER THE PICTURE
Microarray procedure for analyzing gene expression in normal and cancer cells Microarray procedure for analyzing gene expression in normal and cancer cells
Video: Rh blood type and complications during pregnancy & Fertilization

For a complete list of videos, visit our video library