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

Author Question: A random variable x has the following probability distribution: x f(x) 0 0.08 1 0.17 2 0.45 3 0.25 4 ... (Read 126 times)

stephzh

  • Hero Member
  • *****
  • Posts: 556
on: Jun 24, 2018
A random variable x has the following probability distribution: x f(x) 0 0.08 1 0.17 2 0.45 3 0.25 4 0.05
 a. Determine the expected value of x.
  b. Determine the variance.

Question 2

For a sample size of 21 at 95 confidence, the chi-square values needed for interval estimation are
 a. 9.591 and 34.170.
  b. 2.700 and 19.023.
  c. 8.260 and 37.566.
  d. 10.283 and 35.479.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chinwesucks

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 2.02
b. 0.9396

Answer to Question 2

a


stephzh

  • Member
  • Posts: 556
Reply 2 on: Jun 24, 2018
:D TYSM

anyusername12131

  • Member
  • Posts: 327
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

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

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Critical Values of the Chi-Square Distribution Critical Values of the Chi-Square Distribution
Controlled Experiments Manipulate a Variable Controlled Experiments Manipulate a Variable
Gas molecules have no bonds to other molecules and move in random motion. Gas molecules have no bonds to other molecules and move in random motion.
Distribution and Forms of Precipitation: Graupel and Hail Distribution and Forms of Precipitation: Graupel and Hail
How the Distribution of Education Affects the Distribution of Income How the Distribution of Education Affects the Distribution of Income
Global Distribution of Precipitation Global Distribution of Precipitation
Video: Virtual Tour of the Eye Animation

For a complete list of videos, visit our video library