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 137 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
Wow, this really help

Dominic

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Experiment on newt embryos that led to the discovery of Spemann's organizer. Experiment on newt embryos that led to the discovery of Spemann's organizer.
The notorious standford prison experiment The notorious standford prison experiment
The patient's signature on the informed consent form indicates that the patient understands the The patient's signature on the informed consent form indicates that the patient understands the
Aquamatic pad and heating unit provide dry heat treatment to a patient’s arm. Aquamatic pad and heating unit provide dry heat treatment to a patient’s arm.
First and Second Line Drugs for the Treatment of TB First and Second Line Drugs for the Treatment of TB
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: Stimulus (introduction)

For a complete list of videos, visit our video library