Your name
INSTRUCTIONS:
DS 123 Lab #5
1. Under File, select Page Setup. Select the top tab: Sheet.
Due: 3/24/08
In the Print window, select Gridlines and Row and Column Headers.
2. Set column A to 10 and column D to 16.
3. Insert a page break above row 49.
4. Define Postexposure as Variable 1 and Preexposure as Variable 2 in the
DataAnalysis Toolkit t-test for paired two sample for means for Question 1.
Question 1.
Problem 9.32, p. 377
Preexp.
Postexp.
Diffs.
t-Test: Paired Two Sample for Means
50
53
-3
25
27
-2
Postexp.
Preexp.
30
38
-8
Mean
54.5
50.5 Average diff =
4
50
55
-5
Variance
389.39
341.39
60
61
-1
Observations
10
10
80
85
-5
Pearson Correlation
0.99
45
45
0
Hypothesized Mean
0
30
31
-1
df
9
65
72
-7
t Stat
4.19
70
78
-8
P(T<=t) one-tail
0
Mean =
4
t Critical one-tail
1.83
StDev =
3
P(T<=t) two-tail
0
t Critical two-tail
2.26
Hypotheses:
H0: mupost - mupre <= 0
H0: Mupost - mupre <= 0
HA: mpost - mupre not > 0
HA: mupost - Mupre > 0
Rejection Region:
df = 9
Rej H0 if p-value < 0.01
2.26
Test Statistic:
4.19
p-value =
0
Conclusion:
Since the test statistic of
with at least 99% confidence.
H0 with at least 99% confidence.
This
preview
has intentionally blurred sections.
Sign up to view the full version.

This is the end of the preview.
Sign up
to
access the rest of the document.
- Spring '08
- Moffitt
- Statistics, rej h0
-
Click to edit the document details