A researcher has been observing the local Republican Party in a large city and has compiled...
A researcher has been observing the local Republican Party in a large city and has compiled some information about a random sample of 40 party regulars. Descriptive results are presented below.
|
Statistics |
||
|
Number of years in the party |
||
|
N |
Valid |
40 |
|
Missing |
0 |
|
|
Mean |
15.73 |
|
|
Std. Error of Mean |
1.753 |
|
|
Median |
14.50 |
|
|
Mode |
25 |
|
|
Std. Deviation |
11.087 |
|
|
One-Sample Test |
||||||
|
Test Value = 18 |
||||||
|
t |
df |
Sig. (2-tailed) |
Mean Difference |
95% Confidence Interval of the Difference |
||
|
Lower |
Upper |
|||||
|
Number of years in the party |
-1.298 |
39 |
.202 |
-2.275 |
-5.82 |
1.27 |
If the national data show that the mean number of year in the party is 18, test the hypothesis that the sample is significantly different from the national average. Set α=.01
What is the null hypothesis?
|
Ho: µ=10 |
||
|
Ho: µ=18 |
||
|
Ha: µ≠10 |
||
|
Ha: µ≠17.73 |
Homework Answers
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