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

Author Question: A random sample of 60 mathematics majors spent an average of 200.00 for textbooks for a term, with a ... (Read 119 times)

stevenposner

  • Hero Member
  • *****
  • Posts: 608
on: Jul 24, 2018
A random sample of 60 mathematics majors spent an average of 200.00 for textbooks for a term, with a standard deviation of 22.50 . A random sample of 40 English majors spent an average of 180.00 for textbooks that term, with a standard deviation of 18.30 . Calculate a 90 pooled confidence interval for the difference in average amounts spent on textbooks (math majors  English majors).
 a. (12.91, 27.09)
  b. (11.50, 28.50)
  c. (13.19, 26.81)
  d. None of the above

Question 2

Which of the following statements is correct about a parameter and a statistic associated with repeated random samples of the same size from the same population?
 a. Values of a parameter will vary from sample to sample but values of a statistic will not.
  b. Values of both a parameter and a statistic may vary from sample to sample.
  c. Values of a parameter will vary according to the sampling distribution for that parameter.
  d. Values of a statistic will vary according to the sampling distribution for that statistic.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tkempin

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

D


stevenposner

  • Hero Member
  • *****
  • Posts: 608
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


tkempin

  • Sr. Member
  • ****
  • Posts: 332
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Average Chemical Composition of the Geosphere Crust Average Chemical Composition of the Geosphere Crust
Sample Exercise Prescription for Weight Training: Intermediate Sample Exercise Prescription for Weight Training: Intermediate
Sample new patient registration form. Sample new patient registration form.
Sample Advance Directive Cont. Sample Advance Directive Cont.
Sample prescriptions of drugs for oral fungal infections. Sample prescriptions of drugs for oral fungal infections.
Discrete random variables- Probability Distribution Function Discrete random variables- Probability Distribution Function
Video: Electrical changes in the heart

For a complete list of videos, visit our video library