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

Author Question: The length of time it takes students to complete a statistics examination is uniformly distributed ... (Read 189 times)

theo

  • Hero Member
  • *****
  • Posts: 698
The length of time it takes students to complete a statistics examination is uniformly distributed and varies between 40 and 60 minutes.
 a. Find the mathematical expression for the probability density function.
  b. Compute the probability that a student will take between 45 and 50 minutes to complete the examination.
 c. Compute the probability that a student will take no more than 40 minutes to complete the examination.
 d. What is the expected amount of time it takes a student to complete the examination?
  e. What is the variance for the amount of time it takes a student to complete the examination?

Question 2

The general form of an interval estimate of a population mean or population proportion is the _____ plus or minus the _____.
 a. population mean, standard error
  b. level of significance, degrees of freedom
  c. point estimate, margin of error
  d. planning value, confidence coefficient



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kdiggy

  • Sr. Member
  • ****
  • Posts: 340
Answer to Question 1

a. f(x) = .05 for 40  x  60; 0 elsewhere
b. .25
c. 0
d. 50 minutes
e. 33.33 (minutes)2

Answer to Question 2

c




theo

  • Member
  • Posts: 698
Reply 2 on: Jun 24, 2018
Excellent


ricroger

  • Member
  • Posts: 352
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

For a complete list of videos, visit our video library