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1. (21.06) We can conclude from Examples 21.2 and 21.3 that mildly obese people spend less time standing and walking (on theStep 1: State: True or False: We want to know whether mildly obese people spend more time lying down than lean people True FaStep 4: Solve (inference): What is the test statistici? Give your answer to 3 decimal places step S: What is the P-value? 0.0

1. (21.06) We can conclude from Examples 21.2 and 21.3 that mildly obese people spend less time standing and walking (on the average) than lean people Is there a significant difference between the mean times the two groups spend lying down? Use the four-step process to answer this question from the data in Table 21.1 TABLE 21.1 TIME (MINUTES PER DAY) SPENT IN THREE DIFFERENT POSTURES BY LEAN AND OBESE SUBJECTS GROUP Lean Lean Lean Lean Lean Lean Lean Lean Lean SUBIECT STAND/WALK 511.100 607.925 319.212 584.644 578.869 543.388 677.188 555.656 374.831 504.700 260.244 464.756 367.138 413.667 347.375 SIT 370.300 374.512 582.138 357.144 348.994 385.312 268.188 322.219 537.031 528.838 646.281 456.644 578.662 463.333 567.556 567.556 LIE 555.500 450.650 537.362 489.269 514.081 467.700 567.006 531.431 396.962 21.044 514.931 563.300 532.208 504.931 448.856 10 12 13 14 15 16 17 18 19 20 358.650 267.344 410.631 426.356 646.181 572.769 591.369 460.550 448.706 412.919 Follow the model of Examples 21.2 and 21.3
Step 1: State: True or False: We want to know whether mildly obese people spend more time lying down than lean people True False Step 2: Plan: Let 1 and H2 be the mean times spent lying down by the lean and obese groups respectively State the null and alternative hypotheses Step 3: Solve: Are the conditions for inference met? Yes, because we have two independent SRSs and the two distributions have similar shapes. Yes, because the two distributions have similar shapes Yes, because we have two SRSs, and the two distributions have similar shapes and similar spreads. Yes, because we have two independent SRSs, and there are no clear departures from Normality.
Step 4: Solve (inference): What is the test statistici? Give your answer to 3 decimal places step S: What is the P-value? 0.05
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