Chapter 10-T-test for Two Independent Samples

Question 0

State the null hypothesis

Answer 0

H0= μ1-μ2

Question 1

Define:

Independent measures

Answer 1

A research design that uses a separate sample or between subjects design for each treatment condition

Question 2

State the alternative hypothesis

Answer 2

H1= μ1-μ2≠0

Question 3

Define:

Estimated standard error in this chapter

Answer 3

Measure of standard average distance between sample statistic (M1-M2) and the population parameter

Question 4

What is the df equation for two samples

Answer 4

df= df1+df2= (n1-1) +(n2-1)

Question 5

Define:

Pooled Variance

Answer 5

A method for correcting the bias in the sample variance by combining two sample variances into a single value

Question 6

What is the pooled variance equation?

Answer 6

Sp2= SS1+ SS2/ df1+df2

Question 7

What are some assumption for t-test

Answer 7

1. Observations within each sample must be independent
2. Two populations from the samples must be normal
3. Two populations must from the samples must have equal variances

Question 8

What are the steps requires to calculate this?

Answer 8

1. Calculate the means
2. Calculate the SS
3. Calculate the Sp2
4. Calculate the Sm
5. Calculate the t-score

Question 9

List the equations that must be used to calculate this

Answer 9

SS= Σx2-(Σx)2/n
Sp2= SS1+SS2/ df1+df2
S(M1-M2)= √Sp2+Sp2/n1+n2 (do not square numerator)
t= (X1-X2)-(M1-M2)/ S(M1-M2)