BSTAT 3321 Practice Final Exam
. The two graphical techniques we usually use to present nominal data are
bar chart and histogram
ie chart and ogive
histogram and ogive
. Which of the following are deceptive practices
Using a pie chart instead of a bar chart
Using a bar chart instead of a line graj h
Il of the above are deceptive
. In a positively-skewed distribution,
he median equals the mean
he median is larger than the mean
he mean, median, and mode are equal
. The Empirical Rule states that the percentage of measurements in a data
set (providing that the data set has a bell-shaped distribution) that fall
within two standard deviations of their mean is approximately:
Which of the following statements is true for the following data values:
7,5,6,4,7,8,and 12?
Only the mean and median are equal
Only the mean and mode are equal
Only the median and mode are equal
Which of the following sampling plans does not use random methods
of selections?
Simple random sampling.
Stratified random sampling.
Random cluster sampling.
, 7. If two events are mutually exclusive, what is the probability that both occur
at the same time?
0.50
1.00
Cannot be determined from the information given.
8. If A and B are independent events with P(A) = 0.20 and P(B) = 0.60,
then P(A|B) is:
9. The number of fans at a Cowboy’'s game over a given time interval is an
example of a(n) random variable. The length of the game
in minutes is an example of a(n) random variable.
Exponential; Poisson
Continuous; discrete
None of the above
10. The probability of 3 or fewer heads in 10 tosses of an unbiased coin is
117
.883
None of the above
11.Airlines always overbook because of no shows. The probability of a no
show for a reservation is .10. If a flight has 100 reservations, what is
the expected number of passengers who will actually show up? What
is the variance of the number of passengers who actually show up?
12. Given that the random variable X is normally distributed with a mean of
75 and a standard deviation of 5, P (65<X<85)?
None of the above
. The two graphical techniques we usually use to present nominal data are
bar chart and histogram
ie chart and ogive
histogram and ogive
. Which of the following are deceptive practices
Using a pie chart instead of a bar chart
Using a bar chart instead of a line graj h
Il of the above are deceptive
. In a positively-skewed distribution,
he median equals the mean
he median is larger than the mean
he mean, median, and mode are equal
. The Empirical Rule states that the percentage of measurements in a data
set (providing that the data set has a bell-shaped distribution) that fall
within two standard deviations of their mean is approximately:
Which of the following statements is true for the following data values:
7,5,6,4,7,8,and 12?
Only the mean and median are equal
Only the mean and mode are equal
Only the median and mode are equal
Which of the following sampling plans does not use random methods
of selections?
Simple random sampling.
Stratified random sampling.
Random cluster sampling.
, 7. If two events are mutually exclusive, what is the probability that both occur
at the same time?
0.50
1.00
Cannot be determined from the information given.
8. If A and B are independent events with P(A) = 0.20 and P(B) = 0.60,
then P(A|B) is:
9. The number of fans at a Cowboy’'s game over a given time interval is an
example of a(n) random variable. The length of the game
in minutes is an example of a(n) random variable.
Exponential; Poisson
Continuous; discrete
None of the above
10. The probability of 3 or fewer heads in 10 tosses of an unbiased coin is
117
.883
None of the above
11.Airlines always overbook because of no shows. The probability of a no
show for a reservation is .10. If a flight has 100 reservations, what is
the expected number of passengers who will actually show up? What
is the variance of the number of passengers who actually show up?
12. Given that the random variable X is normally distributed with a mean of
75 and a standard deviation of 5, P (65<X<85)?
None of the above
