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 73 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
Thanks for the timely response, appreciate it

Perkypinki

  • Member
  • Posts: 339
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

A normal pregnancy. A normal pregnancy.
Three standard sizes of cuffs: a small cuff for a child or frail adult; a normal-sized adult cuff; ... Three standard sizes of cuffs: a small cuff for a child or frail adult; a normal-sized adult cuff; ...
Hematocrits, left to right: normal, anemia, polycythemia. Hematocrits, left to right: normal, anemia, polycythemia.
Assume z is a standard normal random variable. What is the value of z if the area to the right ... Assume z is a standard normal random variable. What is the value of z if the area to the right ...
Write the following in standard form Write the following in standard form
People who are color-blind see colors differently. (a) Those with normal vision see the red leaves. People who are color-blind see colors differently. (a) Those with normal vision see the red leaves.
Video: Brain Lobes Animation

For a complete list of videos, visit our video library