Use Excel to test. For each paired difference, compute After - Before. In
Data Analysis, t-Test: Paired Two Sample for means, select the After data for
Variable 1 Range. Note that the critical value output by Data Analysis for this
test is always positive. In this problem, the sign of the critical value is
negative corresponding to a 1-tailed test with lower reject region and
negative lower critical value.
What is your conclusion?
Question options:
Do not reject the NULL Hypothesis because the actual value is less than the critical value
Reject the NULL Hypothesis because the actual value is less than the critical value
Do not reject the NULL Hypothesis because the actual value is greater than critical value
Reject the NULL Hypothesis because the actual value is greater than critical value
Question 5
A new drug is created to help people with depression. When testing the
drug, what are the null and alternative hypotheses?
Question options:
H0: As a result of 300mg./day of the ABC drug, there will be no significant difference in depression.
HA: As a result of 300mg/day of the ABC drug, there will be a significant difference in depression.
H0: As a result of 300mg./day of the ABC drug, there will be a significant difference in depression.
HA: As a result of 300mg/day of the ABC drug, there will be no significant difference in depression.
Question 6
Match the null hypothesis (H
0
) to the correct alternative hypothesis (H
1
):
__3__
H
0
: Lot A tensile strength is comparable to lot B tensile Strength
__1__
H
0
: Lot A tensile strength exceeds or equals lot B tensile strength
__2__
H
0
: Lot A tensile strength is not greater than lot B tensile strength
1
.
H
1
: The mean of Lot A tensile strength is < the mean of Lot B tensile strength.
2
.
H
1
: The mean of Lot A tensile strength is > the mean of Lot B tensile strength.
3
.
H
1
: The mean of Lot A tensile strength ≠ the mean of Lot B tensile strength