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T-Test - statistics

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)?

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.

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