QMB 3200 TEST 1
1. What is the z score formula? - CORRECT REPLY>>>-
(the observation - mean) / standard deviation
2. What does a z score tell us? - CORRECT REPLY>>>-
how many standard deviations a value of from the mean
3. How do you find the range? - CORRECT REPLY>>>-
biggest value minus smallest value
4. What is the formula used in excel to find the range? -
CORRECT REPLY>>>-=max(array) - min (array)
5. If a data set has an odd number of observations, the median
a. Cannot be determined
b. is the value of the middle item when all items are
arranged in ascending order
c. is the average value of the two middle items when all
items are arranged in ascending order.
, d. must be equal to the mean - CORRECT
REPLY>>>-b. is the value of the middle item when all
items are arranged in ascending order
6. Which of the following represents the data point that occurs
most frequently in a set of observations?
a. Mean
b. Mode
c. All of these choices are correct
d. Median - CORRECT REPLY>>>-b. Mode
7. The median of a data set is represented by the:
a. 50th percentile
b. 75th percentile
c. 100th percentile
d. 25th percentile - CORRECT REPLY>>>-a. 50th
percentile
8. Which of the following is a possible reason for an outlier in a
data set?
, a. A mistake was made while taking a measurement or
entering it into the computer
b. The individual in question belongs to a different group
than the bulk of individuals measured
c. The outlier is a legitimate data value and represents
natural variability for the group and variables measured
d. All of these choices are possible reasons for an outlier -
CORRECT REPLY>>>-d. All of these choices are
possible reasons for an outlier
9. The following is the frequency distribution for the ages of a
sample of senior citizens who attend a local bingo night. What
is the standard deviation for this data set?
10. Age / Frequency
11. 60-
12. 65-
13. 70-
14. 75-
15. Total: 40
a. 47.8
b. 4.19
c. 17.54
d. 68 - CORRECT REPLY>>>-b. 4.19
1. What is the z score formula? - CORRECT REPLY>>>-
(the observation - mean) / standard deviation
2. What does a z score tell us? - CORRECT REPLY>>>-
how many standard deviations a value of from the mean
3. How do you find the range? - CORRECT REPLY>>>-
biggest value minus smallest value
4. What is the formula used in excel to find the range? -
CORRECT REPLY>>>-=max(array) - min (array)
5. If a data set has an odd number of observations, the median
a. Cannot be determined
b. is the value of the middle item when all items are
arranged in ascending order
c. is the average value of the two middle items when all
items are arranged in ascending order.
, d. must be equal to the mean - CORRECT
REPLY>>>-b. is the value of the middle item when all
items are arranged in ascending order
6. Which of the following represents the data point that occurs
most frequently in a set of observations?
a. Mean
b. Mode
c. All of these choices are correct
d. Median - CORRECT REPLY>>>-b. Mode
7. The median of a data set is represented by the:
a. 50th percentile
b. 75th percentile
c. 100th percentile
d. 25th percentile - CORRECT REPLY>>>-a. 50th
percentile
8. Which of the following is a possible reason for an outlier in a
data set?
, a. A mistake was made while taking a measurement or
entering it into the computer
b. The individual in question belongs to a different group
than the bulk of individuals measured
c. The outlier is a legitimate data value and represents
natural variability for the group and variables measured
d. All of these choices are possible reasons for an outlier -
CORRECT REPLY>>>-d. All of these choices are
possible reasons for an outlier
9. The following is the frequency distribution for the ages of a
sample of senior citizens who attend a local bingo night. What
is the standard deviation for this data set?
10. Age / Frequency
11. 60-
12. 65-
13. 70-
14. 75-
15. Total: 40
a. 47.8
b. 4.19
c. 17.54
d. 68 - CORRECT REPLY>>>-b. 4.19
