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

Author Question: Assume z is a standard normal random variable. Compute the following probabilities. a. P(1.33 z ... (Read 36 times)

CharlieWard

  • Hero Member
  • *****
  • Posts: 578
on: Jun 24, 2018
Assume z is a standard normal random variable. Compute the following probabilities.
 a. P(1.33  z  1.67)
  b. P(1.23  z  1.55)
  c. P(z  2.32)
  d. P(z  2.08)
  e. P(z  1.08)

Question 2

In order to estimate the average electric usage per month, a sample of 196 houses was selected and the electric usage determined.
 a. Assume a population standard deviation of 350 kilowatt-hours. Determine the standard error of the mean.
  b. With a .95 probability, determine the margin of error.
  c. If the sample mean is 2,000 KWH, what is the 95 confidence interval estimate of the population mean?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

smrerig

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .8607
b. .0487
c. .0102
d. .9812
e. .8599

Answer to Question 2

a. 25
b. 49
c. 1951 to 2049


CharlieWard

  • Member
  • Posts: 578
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

laurnthompson

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Summation of Heart Sounds, Normal S2 Summation of Heart Sounds, Normal S2
Refraction Through Uniform and Variable Thickness Glasses Refraction Through Uniform and Variable Thickness Glasses
Features of a normal 12-lead ECG. Features of a normal 12-lead ECG.
Changes in the bronchioles during an asthma attack: (a) Normal bronchiole. (b) The inflammatory ... Changes in the bronchioles during an asthma attack: (a) Normal bronchiole. (b) The inflammatory ...
Blood vessels: (A) normal artery; (B) constriction; (C) arteriosclerosis and atherosclerosis. Blood vessels: (A) normal artery; (B) constriction; (C) arteriosclerosis and atherosclerosis.
A random sample of 87 airline pilots recruited by an airline service had an average yearly ... A random sample of 87 airline pilots recruited by an airline service had an average yearly ...
Video: Enzyme-Catalyzed Reactions

For a complete list of videos, visit our video library