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 57 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?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Average Global Temperature during the Phanerozoic Average Global Temperature during the Phanerozoic
Examples of Impacts Associated with Different Amounts of Global Average Temperat Examples of Impacts Associated with Different Amounts of Global Average Temperat
Sample root cause analysis: Duplicate dose of a narcotic analgesic. Sample root cause analysis: Duplicate dose of a narcotic analgesic.
(a) A turbidometry detector measures laser light directly across from the light source. The sample, ... (a) A turbidometry detector measures laser light directly across from the light source. The sample, ...
How to evaluate the imaginary term i at any exponent i^n How to evaluate the imaginary term i at any exponent i^n
General Mathematics - Finding the Range of a Function General Mathematics - Finding the Range of a Function
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library