WEEK 4 stats

# WEEK 4 stats - Sarah Anderson Statistics week 4 4 a 4 19 b...

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Sarah Anderson Statistics week 4 4.) a. 4, 19 b. 11,12, 16 6.) a. 210 to 219 b. 6 c. 210, 211, 213, 215, 217, 219 10.) 3| 6 4| 7 5| 2 2 4 9 9 6| 0 1 1 3 4 5 8 7| 0 3 5 6 7 8 8| 0 3 4 4 4 4 7 9| 0 5 5 There were a total of 30 uses for the ATM machine, ranging from 36 to 95. 20 of the uses ranged from 60 to 87. 14.) a. median number of calls Median is middle value 38, 40, 41, 45, 48, 48, 50, 50, 51, 51, 52, 52, 53, 54, 55, 55, 55, 56, 56, 57, 59, 59, 59, 62, 62, 62, 63, 64, 65, 66, 66, 67, 67, 69, 69, 71, 77, 78, 79, 79 Since there are an even number of values, there is no middle value The TWO middle values are 57 and 59 Median is average = 58 -------------------- b. 1st and 3rd quartiles 1st quartile is median of lower half: 38, 40, 41, 45, 48, 48, 50, 50, 51, 51 *** 52, 52, 53, 54, 55, 55, 55, 56, 56, 57 Since there are an even number of values, 1st quartile is average of 51 and 52 1st quartile = 51.5 3rd quartile is median of upper half: 59, 59, 59, 62, 62, 62, 63, 64, 65, 66 ** 66, 67, 67, 69, 69, 71, 77, 78, 79, 79 Since there are an even number of values, 3rdquartile is average of 66 and 66

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3rd quartile = 66 -------------------- c. 1st decile and 9th decile Since we have 40 values, we can easily divide values into 10 groups: 1: 38, 40, 41, 45 2: 48, 48, 50, 50 3: 51, 51, 52, 52 4: 53, 54, 55, 55
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