ISDS EXAM 1 PRACTICE #2 Questions With Correct Answers

©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM



ISDS EXAM 1 PRACTICE #2 Questions
With Correct Answers


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 -

answer✔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? - answer✔On average,

satisfaction ratings of Verizon are better


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




The correct answer is: 8.5

, ©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM


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

negatively skewed


What is the range for Verizon? - answer✔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? - answer✔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)? - answer✔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) - answer✔The formula to be

used on Excel is =stdev.s




The correct answer is: 6.53