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 73 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 :)

Bigfoot1984

  • Member
  • Posts: 321
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

A rocky shore at low tide, showing the great abundance that can be attained by populations of intert A rocky shore at low tide, showing the great abundance that can be attained by populations of intert
How People Match Their Goals to Their Means How People Match Their Goals to Their Means
The amount of genetic variation within populations is far greater than the variation between populat The amount of genetic variation within populations is far greater than the variation between populat
A phylogenetic tree showing that all non-African human populations share a closer genetic relationsh A phylogenetic tree showing that all non-African human populations share a closer genetic relationsh
Difference between the house and the senate Difference between the house and the senate
Movement of acorns by blue jays allows gene flow between oak populations Movement of acorns by blue jays allows gene flow between oak populations
Video: Red Blood Cells - Erythropoietin (EPO)

For a complete list of videos, visit our video library