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yobani62
09.12.2020 •
Mathematics
QUICK HELP HURRY MAKRIMG PIEPLE AS BRIANLDIT
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Ответ:
Step-by-step explanation:
From the given information:
Let assume:
Then:
Null hypothesis:![\mu_1 \ge \mu_2](/tpl/images/1248/1425/d9a13.png)
Alternative hypothesis:![\mu_1](/tpl/images/1248/1425/d29e5.png)
By using MINITAB software to compute the 2 sample t-test, we have:
Two-Sample T_Test and CI
Sample N Mean StDev SE Mean
1 12 94.00 3.00 0.87
2 15 90.00 2.00 0.52
Difference =![\mu_1(1)-\mu_2(2)](/tpl/images/1248/1425/2ab52.png)
Estimate of difference: -6.00
99% upper bound for difference: -3.603
T-test of difference: 0 (vs <): T-value = -6.22
P.value = 0.000
DF = 25
Both use Pooled StDev = 2.4900
From above result
the test statistics = -6.00
p-value = 0.00
Decision Rule: To reject![H_o\ \ if \ \ p \le \alpha](/tpl/images/1248/1425/72e22.png)
Conclusion: Provided that p-value is < ∝, we reject
. Hence, there is sufficient evidence to support the given claim.
b) From the MINITAB;
The 99% C.I on the difference in the mean yields that can be applied to test the claim in part (a) is: