« previous next »

Author Question: When testing for the difference between the means of two independent populations, with samples of ... (Read 83 times)

lbcchick

  • Hero Member
  • *****
  • Posts: 550
on: Jun 24, 2018
When testing for the difference between the means of two independent populations, with samples of sizes n1 and n2, where the population variances are unknown but assumed to be equal, what is the number of degrees of freedom?
 
  A) n - 1
  B) n1 + n2 - 1
  C) n1 + n2 - 2
  D) n - 2

Question 2

What is the mean of Y?
 
  A) 680
  B) 330
  C) 120
  D) 140


Melissahxx

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Gangrene of the toes and foot as a result of an infection often means eventual amputation. Gangrene of the toes and foot as a result of an infection often means eventual amputation.
A gasoline testing kit, including an insulated container where water at 100°F is used to heat a ... A gasoline testing kit, including an insulated container where water at 100°F is used to heat a ...
Indigenous Populations Indigenous Populations
E9-23 Prepare income statements Explain the difference in operating income E9-23 Prepare income statements Explain the difference in operating income
Hierarchical clusters in a microarray experiment using RNA samples from Saccharomyces cerevisiae Hierarchical clusters in a microarray experiment using RNA samples from Saccharomyces cerevisiae
Video: Mitosis step-by-step

For a complete list of videos, visit our video library