#7. What are the RANK AND ACTUAL DATA VALUE OF THE 55th PERCENTILE (USE FORMULA
ID: 3353496 • Letter: #
Question
#7. What are the RANK AND ACTUAL DATA VALUE OF THE 55th PERCENTILE (USE FORMULA R = P/100 * (N+1) in the data list in #3
#8. data point “31” from the list in problem #3, and recalculate the mean, standard deviation, Q1, Q2, Q3 and IQR. THEN, IDENTIFY HOW DELETING THAT “OUTLIER” AFFECTED WHICH STATISTICS AND HOW THIS COULD AFFECT ANY INTERPRETATION OF THOSE STATISTICS. DO YOU SEE WHY THE “MEDIAN” PRICE IS USED FOR HOUSES AND “MEDIAN” INCOME IS USED FOR SALARIES (RATHER THAN THE MEAN) ? BUT, SHOULD OUTLIERS ROUTINELY BE DELETED, FOR EXAMPLE THE “ONE DEATH IN A THOUSAND” FOR A PARTICULAR MEDICATION ? SO, WHAT EVIDENCE COULD JUSTIFY DELETING SUCH OUTLIERS?
#9. For the following data COMPUTE the (X)2 and the Y2 (be careful) X Y 5 3 9 8 10 16 #10. In this STEM & LEAF diagram how many numbers are between (a) 20 and 71 INCLUDING 20 and 71 if present AND (b) BETWEEN 102 AND 114 (INCLUDING THOSE ENDS IF PRESENT) (c) DOES THIS DATA DISTRIBUTION LOOK “NORMAL” (BELL CURVE SHAPE)? 11| 4 4 9 10| 3 4 5 7 9 9| 3 5 8 8 8 9 8| 0 0 2 2 2 2 4 7 7| 1 1 1 3 4 6 6 8 8 6| 2 3 5 6 7 8 9 5| 4 5 5 6 6 9 9 4| 2 3 3 3 4 4 2| 0 0 1 3 5 1| 0 0 0 2
Explanation / Answer
Not able to solve 7 and 8 as it refer to Q3 (data set)
9)
10)
a) between 20 and 71
5 + 6 + 7 + 7 + 3 = 28
b) 102 and 114
= 5 + 2 = 7
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x y y^2 5 3 9 sum x 24 9 8 64 (sum x)^2 576 10 16 256 sum (y^2) 329Related Questions
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