Independent random samples from normal populations produced the results shown in the table. Complete parts a through d.
sample 13.2, 2.2, 2.7, 1.4, 2.1
sample 2 2.9, 3.4, 3.4, 3.1
The Minitab output is given below,
Two-Sample T-Test and CI: Sample 1, Sample 2
Two-sample T for Sample 1 vs Sample 2
N Mean StDev SE Mean
Sample 1 5 2.320 0.676 0.30
Sample 2 4 3.200 0.245 0.12
Difference = μ (Sample 1) – μ (Sample 2)
Estimate for difference: -0.880
95% CI for difference: (-1.730, -0.030)
T-Test of difference = 0 (vs ≠): T-Value = -2.45 P-Value = 0.044 DF = 7
Both use Pooled StDev = 0.5356
a.) calculate the pooled estimate of σ2.
s2p = (round to four decimal places as needed)
b.) Do the data provide sufficient evidence to indicate that u2 > u1? Test using a = 0.05
Yes ( )No ( )Please select one.
c.) Find a 95% confidence interval for (u1-u2)
Confidence interval is (round to two decimal places as needed)
d.) Which of the two inferential procedures, the test of hypothesis in part b or the confidence interval in part c, provides more information about (u1-u2)?
Select one:A – The confidence interval in part c provides more information about u1 – u2
B – The test of hypothesis in part b provides more information.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more