« previous next »

Author Question: The time to complete an exam for a randomly chosen student in a textiles class is a normal random ... (Read 123 times)

tfester

  • Hero Member
  • *****
  • Posts: 534
on: Jul 24, 2018
The time to complete an exam for a randomly chosen student in a textiles class is a normal random variable with a mean of 50 minutes and a standard deviation of 10 minutes. At what time will 75 of the class have finished the exam? (i.e. What is the 75th percentile of the distribution?)

Question 2

The WISC scores (similar to IQ test scores) of a sample of n = 20 5th graders will be used to create a 99 confidence interval for the mean WISC score of all 5th graders. What is the correct t multiplier for this interval?
 a. 2.86
  b. 3.55
  c. 2.54
  d. 2.85


kingfahad97

  • Sr. Member
  • ****
  • Posts: 308
Reply #1 on: Jul 24, 2018
Answer to Question 1

56.7 minutes

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

tfester

  • Hero Member
  • *****
  • Posts: 534
Reply #2 on: Jul 24, 2018
Thank you!


kingfahad97

  • Sr. Member
  • ****
  • Posts: 308
Reply #3 on: Jul 24, 2018
Always glad to help...


« previous next »
 

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Complete Menstrual Cycle Complete Menstrual Cycle
Transdermal patch administration: (b) patch immediately applied to clean, dry, hairless skin and lab Transdermal patch administration: (b) patch immediately applied to clean, dry, hairless skin and lab
An Estimate of the Time of Global Peak Conventional Oil Production An Estimate of the Time of Global Peak Conventional Oil Production
Eggs, milk, and cheese are complete proteins, because they are animal products. Eggs, milk, and cheese are complete proteins, because they are animal products.
Increased amounts of "screen time" are contributing to decreased amounts of physical ... Increased amounts of "screen time" are contributing to decreased amounts of physical ...
Normal nerve conduction of Sodium ion Normal nerve conduction of Sodium ion
Video: ribosome

For a complete list of videos, visit our video library