This topic contains a solution. Click here to go to the answer

Author Question: A researcher would like to conduct a hypothesis test to compare the mean SAT scores of students who ... (Read 77 times)

armygirl

  • Hero Member
  • *****
  • Posts: 556
A researcher would like to conduct a hypothesis test to compare the mean SAT scores of students who have received extra coaching and the mean SAT score of students who have not received extra coaching.
 
  In this case, a paired t-test would be appropriate since a natural pairing exists (a pair consists of a student before coaching and the same student after coaching). If the researcher instead uses independent samples and a pooled or nonpooled t-test, how is this likely to affect the probability of a Type II error?
  A) Using independent samples, the probability of a Type II error is likely to be smaller than if a paired sample is used.
  B) Using independent samples, the probability of a Type II error is likely to be larger than if a paired sample is used.
  C) Using independent samples, the probability of a Type II error is likely to be the same as if a paired sample were used.

Question 2

A herpetologist performed a study on the effects of the body type and mating call of the male bullfrog as signals of quality to mates.
 
  Four life-sized dummies of male bullfrogs and two sound recordings provided a tool for testing female response to the unfamiliar frogs whose bodies varied by size (large or small) and color (dark or light) and whose mating calls varied by pitch (high, normal, or low). The female bullfrogs were observed to see whether they approached each of the four life-sized dummies. Identify the experimental units.
  A) All of the frogs, male and female B) The female bullfrogs
  C) The male bullfrogs D) The scientist



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Answer to Question 1

B

Answer to Question 2

B




armygirl

  • Member
  • Posts: 556
Reply 2 on: Jul 25, 2018
Gracias!


flexer1n1

  • Member
  • Posts: 373
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

For a complete list of videos, visit our video library