MATH 225N WEEK 5 DISCUSSION THE
NORMAL DISTRIBUTION 2026 FINAL REVIEW
QUESTIONS ANSWERS BUNDLED PRACTICE
COLLECTION
◉ Net earnings reported by Xena Corp for the last 10 quarters is
which type of variable?
Answer: A time-series variable
◉ A multivariate data set must contain.
Answer: more than two variables
◉ True or False: The following is an example of cross-sectional data:
Scores of 50 students on a midterm accounting exam last semester..
Answer: True
◉ True or False: The following is an example of cross-sectional data:
Bob's scores on weekly accounting quizzes last semester..
Answer: False
◉ True or False: The following is an example of time-series data:
,Mexico's GDP for the last 10 quarters..
Answer: True
◉ Which type of data is the following variable: number of employees
in the Walmart store in Boone, NC?.
Answer: Ratio
◉ Which type of data is the following variable: temperature (in
Fahrenheit) in the ice-cream freezer at a Walmart store?.
Answer: Interval
◉ Which type of data is the following variable: name of the cashier
at register 3 in a Walmart store?.
Answer: Nominal
◉ Which type of data is the following variable: manager's rating (i.e.,
1 = good, 2 = excellent etc.) of the cashier at register 3 in a Walmart
store?.
Answer: Ordinal
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the average
price/earnings ratio for all 500 stocks in the S&P index..
Answer: True
, ◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the
proportion of all stocks in the S&P 500 index that had negative
earnings last year..
Answer: True
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the
proportion of energy-related stocks in a random sample of 50
stocks..
Answer: False
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the average
rate of return for 20 stocks recommended by a broker..
Answer: False
◉ A random sampling technique used when groups are defined by
their geographical location is:.
Answer: Cluster Sampling
◉ An investment firm rates bonds for AardCo Inc. as "B+" while
bonds of Deva Corp. are rated "AA." Which level of measurement
would be appropriate for such (ranked) data?.
NORMAL DISTRIBUTION 2026 FINAL REVIEW
QUESTIONS ANSWERS BUNDLED PRACTICE
COLLECTION
◉ Net earnings reported by Xena Corp for the last 10 quarters is
which type of variable?
Answer: A time-series variable
◉ A multivariate data set must contain.
Answer: more than two variables
◉ True or False: The following is an example of cross-sectional data:
Scores of 50 students on a midterm accounting exam last semester..
Answer: True
◉ True or False: The following is an example of cross-sectional data:
Bob's scores on weekly accounting quizzes last semester..
Answer: False
◉ True or False: The following is an example of time-series data:
,Mexico's GDP for the last 10 quarters..
Answer: True
◉ Which type of data is the following variable: number of employees
in the Walmart store in Boone, NC?.
Answer: Ratio
◉ Which type of data is the following variable: temperature (in
Fahrenheit) in the ice-cream freezer at a Walmart store?.
Answer: Interval
◉ Which type of data is the following variable: name of the cashier
at register 3 in a Walmart store?.
Answer: Nominal
◉ Which type of data is the following variable: manager's rating (i.e.,
1 = good, 2 = excellent etc.) of the cashier at register 3 in a Walmart
store?.
Answer: Ordinal
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the average
price/earnings ratio for all 500 stocks in the S&P index..
Answer: True
, ◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the
proportion of all stocks in the S&P 500 index that had negative
earnings last year..
Answer: True
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the
proportion of energy-related stocks in a random sample of 50
stocks..
Answer: False
◉ True or False: Say, the target population is all stocks in the S&P
500 index. The following is an example of a parameter: the average
rate of return for 20 stocks recommended by a broker..
Answer: False
◉ A random sampling technique used when groups are defined by
their geographical location is:.
Answer: Cluster Sampling
◉ An investment firm rates bonds for AardCo Inc. as "B+" while
bonds of Deva Corp. are rated "AA." Which level of measurement
would be appropriate for such (ranked) data?.
