This topic contains a solution. Click here to go to the answer

Author Question: To construct an interval estimate for the difference between the means of two populations when the ... (Read 180 times)

aabwk4

  • Hero Member
  • *****
  • Posts: 593
To construct an interval estimate for the difference between the means of two populations when the standard deviations of the two populations are unknown and it can be assumed the two populations have equal variances, we must use a t distribution with (let n1 be the size of sample 1 and n2 the size of sample 2)
 a. (n1 + n2) degrees of freedom.
  b. (n1 + n2 - 1) degrees of freedom.
  c. (n1 + n2 - 2) degrees of freedom.
  d. (n1 - n2 + 2) degrees of freedom.

Question 2

When developing an interval estimate for the difference between two population means with sample sizes of n1 and n2,
 a. n1 must be equal to n2.
  b. n1 must be smaller than n2.
  c. n1 must be larger than n2.
  d. n1 and n2 can be of different sizes.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sailorcrescent

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

c

Answer to Question 2

d




aabwk4

  • Member
  • Posts: 593
Reply 2 on: Aug 1, 2018
:D TYSM


ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

For a complete list of videos, visit our video library