Activity 1 Data

Section 1

Team Heat Time
115.75
126.40
134.56
217.22
228.09
238.29
315.56
325.53
335.27
416.22
428.53
435.75
514.63
524.40
534.78
617.54
627.50
637.25

Section 2

Team Heat Time
118.28
127.93
136.56
215.93
226.41
236.47
318.12
327.97
337.78
419.60
429.09
439.47
518.05
528.53
538.30
617.15
627.47
636.25

Hypothesis Testing

Although hypothesis testing isn't covered until later, here are some tests things will be looking at later. Don't worry too much about what they mean for right now, but you may want to come back and look at them later.

We're going to look at the mean walking time of each of the heats to see if the heat number is a factor in the walking time.

In each case, we'll assume that there is no difference in the walking times of the different heats. The P-value from the Analysis of Variance table is the chance of getting the results we got if there really is no difference. If the P-value is small, say less than 5% (0.05), then we say our results are too unusual to have happened by chance alone and we reject the assumption that the mean walking times are all the same.

Section 1 - Combined Data

Summary Statistics

Heat123All
n66618
Mean6.1536.7425.9836.293
St Dev1.0861.5911.4811.360

Analysis of Variance

Source SS df MS F P
Heat 1.9002 2 0.9501 0.4827 0.626352
Within 29.5222 15 1.9681  
Total 31.4224 17 1.8484

Critical F(2,15,0.05) value = 3.6823.

Section 2 - Combined Data

Summary Statistics

Heat123All
n66618
Mean7.8557.9007.4727.742
St Dev1.2280.9191.2731.099

Analysis of Variance

Source SS df MS F P
Heat 0.6649 2 0.3324 0.2511 0.781177
Within 19.8618 15 1.3241  
Total 20.5267 17 1.2075

Critical F(2,15,0.05) value = 3.6823.

Combined Data for Semester

Summary Statistics

Heat123All
n12121236
Mean7.0047.3216.7287.018
St Dev1.4181.3791.5291.423

Analysis of Variance

Source SS df MS F P
Heat 2.1155 2 1.0577 0.5078 0.606459
Within 68.7416 33 2.0831  
Total 70.8571 35 2.0245

Critical F(2,33,0.05) value = 3.2849.

Data Dictionary

section
The section number of the class (1,2)
team
The team number (1-8 for section 1, 1-6 for section 2)
heat
The heat number (1-3)
time
The time in seconds required to walk 25 ft.