Time spent standing or walking. A study was undertaken to compare daily activity levels in lean (group 1) and obese (group 2) study subjects. Sensors monitored the type and amount of routine daily activities such as walking, sitting, and lying down in each subject. Data are shown in Table 12.15. We wish to compare time spent standing or walking (column 4) in lean and obese study subjects. Use SPSS to answer the following questions

State the hypotheses

Structure the Summary statistics Table

what test will you use to compare means

Test the hypothesis (show your SPSS output)

Based on SPSS results, is equal variance assumed? Explain

Interpret your findings in the light of equal variance and unequal variance

Calculate the 95% confidence interval for the difference in mean

ID #	Group 1=lean; 2=obese	Sitting (min/day)	Standing or walking (min/day)	Lying down (min/day)
1	1	370.3	511.1	555.5
2	1	374.5	607.9	450.7
3	1	582.1	319.2	537.4
4	1	357.1	584.6	489.3
5	1	349.0	578.9	514.1
6	1	385.3	543.4	506.5
7	1	268.2	677.2	467.7
8	1	322.2	555.7	567.0
9	1	537.0	374.8	531.4
10	1	528.8	504.7	397.0
11	2	646.3	260.2	521.0
12	2	456.6	464.8	514.9
13	2	578.7	367.1	563.3
14	2	463.3	413.7	532.2
15	2	567.6	347.4	504.9
16	2	567.6	416.5	448.9
17	2	621.3	358.7	460.6
18	2	646.2	267.3	510.0
19	2	572.8	410.6	448.7
20	2	591.4	426.4	412.9