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    T-Test - statistics

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    We have been working with one-sided and two-sided t tests but I do not know how to do this problem:

    The observed time that 20 individuals spend standing and walking per day is reported in the following table:

    Group n Mean Std. dev
    Group 1 (lean) 10 525.751 107.121
    Group 2 (obese) 10 373.269 67.498

    (a) Test the null hypothesis that there is no difference in mean time per day
    spend standing or walking between the two groups against a two sided
    alternative at = 0:01 significance. Report your test statistic, a bound
    for your p-value, and your conclusions regarding the null hypothesis.

    (b) Verify your results with an appropriate confidence interval. Does this
    confidence interval support your conclusions in part (a)?

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    Solution Preview

    Please refer to the attachment.

    Problem:
    The observed time that 20 individuals spend standing and walking per day is reported in the following table:
    Group n Mean Std. dev
    Group 1 (lean) 10 525.751 107.121
    Group 2 (obese) 10 373.269 67.498
    (a) Test the null hypothesis that there is no difference in mean time per day spend standing or walking between the two groups against a two sided alternative at = 0:01 significance. Report your test statistic, a bound for your p-value, and your conclusions regarding the null hypothesis.
    (b) ...

    Solution Summary

    The solution comprises of detailed step-by-step calculation and discussion of two-sample hypothesis t-test and confidence interval pertaining to the given data.

    $2.19

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