ECN 221 ASU Exam 1 Review Question
and answers already passed 2025
The five-number summary consists of what five statistical measures? - correct
answer ✔min, Q1, median, Q3, max
The coefficient of variation indicates how large the standard deviation is
relative to the _____. - correct answer ✔mean
Excel's _____ function can be used to compute the mean. - correct answer
✔average
The descriptive measure of dispersion that is based on the concept of a
deviation about the mean is _____. - correct answer ✔neither the range nor
the interquartile range
How is coefficient of variation calculated? - correct answer ✔standard
deviation/mean
How do you calculate z-score? - correct 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? - correct answer ✔*10*
5!/(2!(5-2)!)
or
5C2
, A(n) __________ is a collection of sample points. - correct 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 _____. - correct 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 _____. - correct
answer ✔.104
3C0(.8^0)(.2^3) + 3C1(.8^1)(.2^2)
If you are conducting an experiment where the probability of a success is .02
and you are interested in the probability of two successes in 15 trials, the
correct probability function to use is the _____. - correct answer ✔binomial
probability function
Which of the following is a characteristic of an experiment where the binomial
probability distribution is applicable? - correct answer ✔The trails are *not*
dependent
The probabilities of the outcomes do not change from one trial to another.
Exactly two outcomes are possible on each trial.
The experiment has a sequence of n identical trials.
60.2% of the applications received for a credit card are accepted. Among the
next 14 applications, what is the probability that 6 will be accepted? - correct
answer ✔0.089991
and answers already passed 2025
The five-number summary consists of what five statistical measures? - correct
answer ✔min, Q1, median, Q3, max
The coefficient of variation indicates how large the standard deviation is
relative to the _____. - correct answer ✔mean
Excel's _____ function can be used to compute the mean. - correct answer
✔average
The descriptive measure of dispersion that is based on the concept of a
deviation about the mean is _____. - correct answer ✔neither the range nor
the interquartile range
How is coefficient of variation calculated? - correct answer ✔standard
deviation/mean
How do you calculate z-score? - correct 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? - correct answer ✔*10*
5!/(2!(5-2)!)
or
5C2
, A(n) __________ is a collection of sample points. - correct 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 _____. - correct 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 _____. - correct
answer ✔.104
3C0(.8^0)(.2^3) + 3C1(.8^1)(.2^2)
If you are conducting an experiment where the probability of a success is .02
and you are interested in the probability of two successes in 15 trials, the
correct probability function to use is the _____. - correct answer ✔binomial
probability function
Which of the following is a characteristic of an experiment where the binomial
probability distribution is applicable? - correct answer ✔The trails are *not*
dependent
The probabilities of the outcomes do not change from one trial to another.
Exactly two outcomes are possible on each trial.
The experiment has a sequence of n identical trials.
60.2% of the applications received for a credit card are accepted. Among the
next 14 applications, what is the probability that 6 will be accepted? - correct
answer ✔0.089991
