ECN 221 ASU EXAM 1 REVIEW | VERIFIED STUDY |
QUESTIONS AND ANSWERS | 2026 UPDATE
The five-number summary consists of what five statistical measures? - ANSWER- min, Q1,
median, Q3, max
The coefficient of variation indicates how large the standard deviation is relative to the _____. -
ANSWER- mean
Excel's _____ function can be used to compute the mean. - ANSWER- average
The descriptive measure of dispersion that is based on the concept of a deviation about the
mean is _____. - ANSWER- neither the range nor the interquartile range
How is coefficient of variation calculated? - ANSWER- standard deviation/mean
How do you calculate z-score? - ANSWER- (value-mean)/standard deviation
Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible
selections are there? - ANSWER- *10*
5!/(2!(5-2)!)
or
5C2
A(n) __________ is a collection of sample points. - ANSWER- event
Three applications for admission to a local university are checked to determine whether each
applicant is male or female. The number of sample points in this experiment is _____. -
ANSWER- *8*
2^3
The probability Pete will catch fish when he goes fishing is .8. Pete is going fishing 3 days next
week.
The probability that Pete will catch fish on 1 or fewer days is _____. - ANSWER- .104
3C0(.8^0)(.2^3) + 3C1(.8^1)(.2^2)
QUESTIONS AND ANSWERS | 2026 UPDATE
The five-number summary consists of what five statistical measures? - ANSWER- min, Q1,
median, Q3, max
The coefficient of variation indicates how large the standard deviation is relative to the _____. -
ANSWER- mean
Excel's _____ function can be used to compute the mean. - ANSWER- average
The descriptive measure of dispersion that is based on the concept of a deviation about the
mean is _____. - ANSWER- neither the range nor the interquartile range
How is coefficient of variation calculated? - ANSWER- standard deviation/mean
How do you calculate z-score? - ANSWER- (value-mean)/standard deviation
Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible
selections are there? - ANSWER- *10*
5!/(2!(5-2)!)
or
5C2
A(n) __________ is a collection of sample points. - ANSWER- event
Three applications for admission to a local university are checked to determine whether each
applicant is male or female. The number of sample points in this experiment is _____. -
ANSWER- *8*
2^3
The probability Pete will catch fish when he goes fishing is .8. Pete is going fishing 3 days next
week.
The probability that Pete will catch fish on 1 or fewer days is _____. - ANSWER- .104
3C0(.8^0)(.2^3) + 3C1(.8^1)(.2^2)
