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 39 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?

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?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

The U.S. Long-Term Ecological Research (LTER) network. The U.S. Long-Term Ecological Research (LTER) network.
The Role of Summation in Long-Term Potentiation The Role of Summation in Long-Term Potentiation
Sample Program for Changing Daily Caloric Intake Sample Program for Changing Daily Caloric Intake
Types of Long-Term Memories Types of Long-Term Memories
The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equiva The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equiva
If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ... If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ...
Video: Gas exchange - driving force

For a complete list of videos, visit our video library