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  3. a treadmill manufacturer has developed a new machi

A treadmill manufacturer has developed a new machine with softer tread and better fans than its...

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Basic Math

A treadmill manufacturer has developed a new machine with softertread and better fans than its current model. The manufacturerbelieves these new features will enable runners to run for longertimes than they can on its current machines. To determine whetherthe desired result is achieved, the manufacturer randomly sampled10 runners. Each runner was measured for one week on the currenttreadmill and for one week on the new treadmill. The weekly totalnumber of minutes for each runner on the two types of treadmillswas collected, and is provided in the table below.

Runner

New treadmill (minutes run)

Current treadmill (minutes run)

1

269

270

2

280

268

3

260

254

4

271

256

5

273

258

6

264

264

7

263

262

8

260

251

9

263

264

10

274

258

Construct a 98% confidence interval estimate of the meandifference in running time (in minutes) on the new and currenttreadmills.

ANSWER:  (Click to select)-±+  ≤ (Click toselect)(μ1 - μ2)(n1 - n2)(σ1 - σ2)μd(p1 - p2)(s1 - s2)(π1 -π2)(x-bar1 - x-bar2) ≤ (Click toselect)±+-  (report your answers to 2 decimalplaces, using conventional rounding rules.)

Answer & Explanation Solved by verified expert
3.6 Ratings (307 Votes)
Since we are doing repeated measure on same subject this is apaired sample study designThe 98 confidence interval for the    See Answer
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