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 74 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
Gracias!

raili21

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Summation of Heart Sounds, Variable S1 Summation of Heart Sounds, Variable S1
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Normal Faults Common at divergent plate boundaries Normal Faults Common at divergent plate boundaries
Standard Precautions for the Care of all Patients in All Health Care Settings Standard Precautions for the Care of all Patients in All Health Care Settings
How to sketch a quadratic equation that is in standard form (Question 1) How to sketch a quadratic equation that is in standard form (Question 1)
Standard Electrode Potentials at 25 Degrees Standard Electrode Potentials at 25 Degrees
Video: Types of synapses - electrical & chemical

For a complete list of videos, visit our video library