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 78 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

6ana001

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Normal defese mechanisms against infection Normal defese mechanisms against infection
Listening to Normal Speech or Its Prosodic Components Functional MRI scans were made while subjects Listening to Normal Speech or Its Prosodic Components Functional MRI scans were made while subjects
An accessory belt tensioner. Most tensioners have a mark that indicates normal operating location. ... An accessory belt tensioner. Most tensioners have a mark that indicates normal operating location. ...
(A) Tetralogy of Fallot; (B) normal anatomy. (A) Tetralogy of Fallot; (B) normal anatomy.
) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase ) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase
Expulsion of fetus and afterbirth during normal delivery. The afterbirth consists of the placenta, t Expulsion of fetus and afterbirth during normal delivery. The afterbirth consists of the placenta, t
Video: Vascular tissues in a corn stem and a buttercup root

For a complete list of videos, visit our video library