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

Author Question: The length of time it takes students to complete a statistics examination is uniformly distributed ... (Read 211 times)

theo

  • Hero Member
  • *****
  • Posts: 698
on: Jun 24, 2018
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
Reply #1 on: Jun 24, 2018
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
:D TYSM

ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Having a time zone map located near the telephone will assist you when making long distance calls ou Having a time zone map located near the telephone will assist you when making long distance calls ou
Statistics on how Americans commit suicide Statistics on how Americans commit suicide
Under what conditions can part-time employment in high school be a negative influence on school ... Under what conditions can part-time employment in high school be a negative influence on school ...
College Students, By Sex and Race-Ethnicity College Students, By Sex and Race-Ethnicity
Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ... Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ...
Video: Role of the respiratory system - effect of altered ventilation rates

For a complete list of videos, visit our video library