Ten people agree to take part in an experiment designed to determine whether a persons weight differs between morning & evening. Each person is weighed last thing at night & first thing in the morning, wearing the same clothes.
The results, giving weights in kilogrammes are below.
weight 1 2 3 4 5 6 7 8 9 10
night 70.5 61.0 27.5 55.0 65.0 64.0 50.0 31.0 45.5 41.0
morn 70.0 60.5 27.0 55.0 65.0 62.5 49.0 30.0 44.5 40.5
Is there any evidence of a difference in a persons weight between night & morning? State clearly the null & alternative hypotheses you are testing & any assumptions you have to make. Use a 1% level of significance.
Use minitab to do a 2-sample t-test & a paired t-test at the 1% level of significance to test the hypothesis that a persons weight in the morning is less than their weight at night. (Interpret the output)
Discuss the difference between the two tests.© BrainMass Inc. brainmass.com October 24, 2018, 5:37 pm ad1c9bdddf
Hypotheses based on given data are tested using t-tests. A Word file and an Excel file are included with this comprehensive solution.
Hypothesis Testing: T-tests
Please use the data from the below questions and the attached data!
1) Conduct a hypothesis test analysis to determine if there is a statistical difference between the ages of the sexes in the group. State what you are testing. Write the hypotheses. Show the relevant numbers. Then explain the results. Using alpha = .05.
2) Analyze if women drink more sodas than men. For the purposes of this DQ, assume that in the past there has been no difference. However, you have seen lots of women drinking sodas the past few months. Perform a hypothesis test to determine if women now drink more sodas than men. State what the test is. Write the hypotheses. Show the relevant numbers. Then explain the results. Use alpha = .05.
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