When testing for the difference between the means of two independent populations, with samples of ...

Author Question: When testing for the difference between the means of two independent populations, with samples of ... (Read 72 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

Need homework help now?

Ask unlimited questions for free

Ask a Question

« previous next »

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?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.