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

Author Question: An experiment is conducted with two groups of college students. The 25 students in the treatment ... (Read 66 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 24, 2018
An experiment is conducted with two groups of college students. The 25 students in the treatment group scored an average of 3.7 with a standard deviation of 0.8 . The 18 students in the placebo group scored an average of 3.3 with a standard deviation of 1.0 . Compare the degrees of freedom from Welch's approximation with the conservative by-hand estimate for the degrees of freedom.

Question 2

Suppose that 20 of a random sample of n = 64 men are currently single. What is the standard error of the proportion of single men in the sample?
 a. 0.125
  b. 0.05
  c. 0.10
  d. 0.20


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yuyiding

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jul 24, 2018
Answer to Question 1

Conservative estimate: df = 17; Welch's approximation: df = 31.5

Answer to Question 2

B


penguins

  • Member
  • Posts: 903
Reply 2 on: Jul 24, 2018
:D TYSM

kthug

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the
The Meselson-Stahl Experiment The Meselson-Stahl Experiment
Schematic illustration of Myers and Sperry’s (1953) groundbreaking split-brain experiment. There ... Schematic illustration of Myers and Sperry’s (1953) groundbreaking split-brain experiment. There ...
Drinking Alcohol use by college students Drinking Alcohol use by college students
The Milgram Obedience Experiment The Milgram Obedience Experiment
The percentage of Canadian students in Grades 7 through 12 who used drugs The percentage of Canadian students in Grades 7 through 12 who used drugs
Video: Coaductile pathway, Timing of contraction signal & Conduction system and ECG

For a complete list of videos, visit our video library