Question

Round any numerical answers to 3 decimal places.

1.) A weight loss study measures each participant’s weight before the study and then 12 weeks into the study. A sample of 31 participants enrolled in the study and the mean difference in their weights (computed before – after) was found to be 4.1 pounds with a standard deviation of 3.2 pounds. In Minitab Express, conduct a paired means t-test to determine if there is evidence that the participants on average lost weight during the 12 weeks. Use the five-step hypothesis testing procedure and remember to include all relevant Minitab Express output.

A.   Write the hypotheses for the above test.

B. Calculate the test statistic.

C. Determine the p-value.

D. Decide between the null and the alternative hypotheses.

E. State a “real world” conclusion.

Answer 1

Here in minitab

select STAT - Basic statistics - paired t - test

select summarized data in drop down box

then enter sample size,mean and standard deviation

next select options select difference > hypothesized difference

then click ok and then ok

we will get the following output

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