This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: To construct an interval estimate for the difference between the means of two populations when the ... (Read 211 times)

aabwk4

  • Hero Member
  • *****
  • Posts: 593
on: Aug 1, 2018
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
Reply #1 on: Aug 1, 2018
Answer to Question 1

c

Answer to Question 2

d


aabwk4

  • Member
  • Posts: 593
Reply 2 on: Aug 1, 2018
Great answer, keep it coming :)

aliotak

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

The difference between a human and an ape. The difference between a human and an ape.
Difference between chromosomes, chromatids, and chromatins Difference between chromosomes, chromatids, and chromatins
Difference Between a Sidereal Month and a Synodic Month Difference Between a Sidereal Month and a Synodic Month
E9-23 Prepare income statements Explain the difference in operating income E9-23 Prepare income statements Explain the difference in operating income
An electron is accelerated from rest through a potential difference. After acceleration the ... An electron is accelerated from rest through a potential difference. After acceleration the ...
Video: Introduction to Breast Cancer

For a complete list of videos, visit our video library