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ISDS EXAM 1 PRACTICE #2 Questions and Answers 100% Solved

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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 outside the upper limit and lower limit is an outlier. Formula for upper limit = Q3 + 1.5 * IQR Which of the following statement is true for the satisfaction ratings? - On average, satisfaction ratings of Verizon are better What is Sprint's interquartile range? - Formula for IQR is Q3-Q1 The correct answer is: 8.5 How do you characterize the shape of Verizon's satisfaction rating? - Slightly negatively skewed

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©NINJANERD 2024/2025. YEAR PUBLISHED 2024.

ISDS 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 outside the upper limit and lower limit is an outlier.



Formula for upper limit = Q3 + 1.5 * IQR

Which of the following statement is true for the satisfaction ratings? -

✔✔On average, satisfaction ratings of Verizon are better

What is Sprint's interquartile range? - ✔✔Formula for IQR is Q3-Q1



The correct answer is: 8.5

How do you characterize the shape of Verizon's satisfaction rating? -

✔✔Slightly negatively skewed

, ©NINJANERD 2024/2025. YEAR PUBLISHED 2024.

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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