STATISTICS BEC1 STATISTICS FINAL EXAM
SOLUTIONS WGU CERTIFICATION STUDY
GUIDE 2026 COMPLETE VERIFIED
ANSWERS GRADED A+
⩥ A company has three divisions and three conference rooms for
meetings. To keep track of the use of their facilities, for each meeting
held in the company, the division holding the meeting is recorded, the
room for the meeting is recorded, and the length of time of the meeting
is recorded. Which of the variables is quantitative. Answer: the length of
the time for the meeting
⩥ Eighteen faculty members in a college math department range in age
from 32 to 68. A stemplot follows:
3-2 4 8 9 9
4-0 3 5 6 9
5-3 4 7 8 9 9
6-3 8
The first and third quartiles of the ages of the faculty members are:.
Answer: 39 and 58 years
, ⩥ A violin student records the number of hours she spends packing
during each of nine consecutive weeks.
6.2 5.0 4.3 7.4 5.8 7.2 8.4 1.2 6.3
What is the interquartile range (IQR) for this data?. Answer:
⩥ In a class of 100 students, the grades on an accounting test are
summarized in the following frequency table.
Grade Frequency
91-100 11
81-90 31
71-80 42
61-70 16
The median grade is in which interval?. Answer: 71-80
⩥ Scores on a university exam are normally distributed with a mean of
78 and a standard deviation of 8. The professor teaching the class
declares that a score of 70 or higher is required for a grade of at least
"C." Using the 68-95-99.7 rule, what percent of students score below
62?. Answer: 2.5%
⩥ A company produces packets of soap powder labeled "Giant Size 32
Ounces." The actual weight of soap powder in such a box has a normal
SOLUTIONS WGU CERTIFICATION STUDY
GUIDE 2026 COMPLETE VERIFIED
ANSWERS GRADED A+
⩥ A company has three divisions and three conference rooms for
meetings. To keep track of the use of their facilities, for each meeting
held in the company, the division holding the meeting is recorded, the
room for the meeting is recorded, and the length of time of the meeting
is recorded. Which of the variables is quantitative. Answer: the length of
the time for the meeting
⩥ Eighteen faculty members in a college math department range in age
from 32 to 68. A stemplot follows:
3-2 4 8 9 9
4-0 3 5 6 9
5-3 4 7 8 9 9
6-3 8
The first and third quartiles of the ages of the faculty members are:.
Answer: 39 and 58 years
, ⩥ A violin student records the number of hours she spends packing
during each of nine consecutive weeks.
6.2 5.0 4.3 7.4 5.8 7.2 8.4 1.2 6.3
What is the interquartile range (IQR) for this data?. Answer:
⩥ In a class of 100 students, the grades on an accounting test are
summarized in the following frequency table.
Grade Frequency
91-100 11
81-90 31
71-80 42
61-70 16
The median grade is in which interval?. Answer: 71-80
⩥ Scores on a university exam are normally distributed with a mean of
78 and a standard deviation of 8. The professor teaching the class
declares that a score of 70 or higher is required for a grade of at least
"C." Using the 68-95-99.7 rule, what percent of students score below
62?. Answer: 2.5%
⩥ A company produces packets of soap powder labeled "Giant Size 32
Ounces." The actual weight of soap powder in such a box has a normal
