ISDS EXAM 1 PRACTICE #2 Questions and Answers 100% Solved
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ISDS
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ISDS
SDS EXAM 1 PRACTICE #2 Questions
and Answers 100% Solved
The city of Chicago (which was not among the 20 cities) has a satisfaction
rating of 85 for Sprint. In terms of Sprint's satisfaction rating, Chicago can
be considered an outlier because - it is greater than 83.25
Anything that lies outs...
What is the range for Verizon? - ✔✔Formula for range is Max-Min
The correct answer is: 6
What is the value of the lower limit that is used to identify outliers for
Sprint's satisfaction rating? - ✔✔Formula for lower limit is Q1- 1.5*IQR
The correct answer is: 49.25
What is the mean of the speeds (to 1 decimal point)? - ✔✔Formula for
mean to be used on Excel is =average
The correct answer is: 75.2
What is the standard deviation for the speeds? (to 2 decimal points) -
✔✔The formula to be used on Excel is =stdev.s
The correct answer is: 6.53
What is the z-score for a vehicle travelling at a speed of 62mph? - ✔✔The
formula for calculating z-score is (x - mean)/standard deviation
The correct answer is: -2
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