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Frequency Distribution

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Submitted By tmartin27
Words 322
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Frequency Distributions & Sampling 1. Is the lager sampling changing anything? 2. Is your mean increasing or decreasing? 3. Do you think your current data is enough to paint a picture?
The increasing of collected data quite fortunately allowed the majority of the data to remain the same. It increased the total drive time 392 total minutes of drive time. However, mean and mode still remained the same with an average of 24.5 minutes (mean) and a reoccurring number of number 22 (mode) which repeats a total of 4 times. Based on the consistency of my data I do believe I have enough information to create an accurate assessment of the collected data. Day | Amount of time it takes to drive to work daily | 1 | 27 minutes | 2 | 29 minutes | 3 | 21 minutes | 4 | 24 minutes | 5 | 22 minutes | 6 | 25 minutes | 7 | 28 minutes | 8 | 22 minutes | 9 | 26 minutes | 10 | 23 minutes | 11 | 22 minutes | | Five additional days of data | 12 | 25 minutes | 13 | 23 minutes | 14 | 22 minutes | 15 | 26 Minutes | 16 | 27 Minutes | | | | |

x | f | xf | (x-xbar)^2 | (x-xbar)^2*f | 1 | 27 | 27 | 55.443 | 1496.9587 | 2 | 29 | 58 | 41.551 | 1204.9766 | 3 | 21 | 63 | 29.659 | 622.8372 | 4 | 24 | 96 | 19.767 | 474.4060 | 5 | 22 | 110 | 11.875 | 261.2482 | 6 | 25 | 150 | 5.983 | 149.5729 | 7 | 28 | 196 | 2.091 | 58.5456 | 8 | 22 | 176 | 0.199 | 4.3762 | 9 | 26 | 234 | 0.307 | 7.9798 | 10 | 23 | 230 | 2.415 | 55.5431 | 11 | 22 | 242 | 6.523 | 143.5042 | 12 | 25 | 300 | 12.631 | 315.7729 | 13 | 23 | 299 | 20.739 | 476.9951 | 14 | 22 | 308 | 30.847 | 678.6322 | 15 | 26 | 390 | 42.955 | 1116.8278 | 16 | 27 | 432 | 57.063 | 1540.6987 |

Σf= 392
Σxf= 331
Σ(x- x)2 xf =8608.8751
=3311/392
=8.45
=√8608.8751/392
=√21.9614
=4.69

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