« previous next »

Author Question: The time to complete an exam for a randomly chosen student in a textiles class is a normal random ... (Read 110 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?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

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

Normal lung and one with emphysema. Normal lung and one with emphysema.
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
Normal lab values Normal lab values
Normal Values for Urinalysis Testing Normal Values for Urinalysis Testing
Fixed bed state (i) and complete fluidization (ii) Fixed bed state (i) and complete fluidization (ii)
A time map of the genes studied in the experiment A time map of the genes studied in the experiment
Video: What is an ecosystem?

For a complete list of videos, visit our video library