TASK 1: Relative Standing (Z -Scores) When investigating times required for driv
ID: 3334711 • Letter: T
Question
TASK 1: Relative Standing (Z -Scores) When investigating times required for drive through service, the following results (in seconds) are obtained for two competing fast food restaurants McDonalds 337 228142360 256 290 243 168 253304 243 186 275 In-N-Out 245 16574377 300 481 428 255 328270 109 210 255 McDonalds In - n Out P1:L1 P2:L2 Min 250 Max300 min-250 max 300 1-Var Stats 1-Var Stats =252. 6923077 Ex=3285 Ex 2=877921 5x=63. 13132426 ×=60 . 6546144 n= 13 -=269 ×=3497 ×2=1105915 S×= 1 1 7 . 33925 1 7 ×=112. 7359065 n= 13 1. How is the data distributed? Is it symmetric about any point in particular? 2. Which of the displays above gives us the mean? What is the mean for each sample? 3. Which display gives us the standard deviation? What is the standard deviation for each sample? What does the standard deviation tell us?Explanation / Answer
1. The data for McDonalds is approximately symmetric.
The data for In - n - out is symmetrical about 269 which is the mean.
2. The mean is given in var stats.
The mean for McDonalds is 252.6923077 and the mean for In - n - out is 269.
3. The standard deviation is given in var stats.
The standard deviation for McDonalds is 63.14142626 and the standard deviation for In - n - out is 117.3392517.
Since the standard deviation of In - n - out is more, the data is more spread for In - n - out and more centered for McDonalds.
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