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 140 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
Thanks for the timely response, appreciate it

irishcancer18

  • Member
  • Posts: 310
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

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.

Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to
In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han
Naltrexone as a Treatment for Alcoholism Naltrexone as a Treatment for Alcoholism
Drugs Used in the Treatment of Migraine Drugs Used in the Treatment of Migraine
Classification of Antidepressants: Treatment of Major Depressive Disorder Classification of Antidepressants: Treatment of Major Depressive Disorder
Evolution of Treatment for Mental Disorders Evolution of Treatment for Mental Disorders
Video: Blood Flow through the Human Heart

For a complete list of videos, visit our video library