QMB 2100 EXAM QUESTIONS AND
CORRECT ANSWERS
Which measures of central location are not affected by extremely small or extremely
large values? - Answer-mode and median
The ages of all the patients in the isolation ward of the hospital are 38,26,13,41, and 22.
What is the population variance? - Answer-106.8
Sometimes, a data set has two values that have the highest and equal frequencies. In
this case, the distribution of the data can best be described as __________. - Answer-
Bimodal (having two modes)
A disadvantage of using an arithmetic mean to summarize a set of data is that the
arithmetic mean_______ - Answer-Can be biased by one or two extremely small or
large values.
A sample of wires coming off the production line was tested for tensile strength. The
statistical results (in PSI) were the following: Arithmetic mean 500 Median 500 Mode
500 Standard deviation 40 Quartile deviation 25 Mean deviation 32 Range 240 Sample
size 100 According to the Empirical rule, the middle 95% of the wires tested had a
tensile strength between approximately what two values - Answer-420 and 580
Assume a student received the following grades for the semester: History, B; Statistics,
A; Spanish, C; and English, C. History and English are 5 credit-hour courses, Statistics
a 4 credit-hour course, and Spanish a 3 credit-hour course. If 4 grade points are
assigned for an A, 3 for a B, and 2 for a C, what is the weighted mean grade for the
semester? - Answer-276
Assume a student received the following grades for the semester: History, B; Statistics,
A; Spanish, C; and English, C. History and English are 8 credit-hour courses, Statistics
a 8 credit-hour course, and Spanish a 3 credit-hour course. If 4 grade points are
assigned for an A, 3 for a B, and 2 for a C, what is the weighted mean grade for the
semester? - Answer-2.89
A company reported that annual revenue increased from $528 million in 1998to $5,100
million in 2001. What is the geometric mean annual percent increase in international
passenger revenues - Answer-10.4
A bottling company offers three kinds of delivery service : instant, same day and within
5 days . The profit per delivery varies according to the kind of delivery. The profit for an
CORRECT ANSWERS
Which measures of central location are not affected by extremely small or extremely
large values? - Answer-mode and median
The ages of all the patients in the isolation ward of the hospital are 38,26,13,41, and 22.
What is the population variance? - Answer-106.8
Sometimes, a data set has two values that have the highest and equal frequencies. In
this case, the distribution of the data can best be described as __________. - Answer-
Bimodal (having two modes)
A disadvantage of using an arithmetic mean to summarize a set of data is that the
arithmetic mean_______ - Answer-Can be biased by one or two extremely small or
large values.
A sample of wires coming off the production line was tested for tensile strength. The
statistical results (in PSI) were the following: Arithmetic mean 500 Median 500 Mode
500 Standard deviation 40 Quartile deviation 25 Mean deviation 32 Range 240 Sample
size 100 According to the Empirical rule, the middle 95% of the wires tested had a
tensile strength between approximately what two values - Answer-420 and 580
Assume a student received the following grades for the semester: History, B; Statistics,
A; Spanish, C; and English, C. History and English are 5 credit-hour courses, Statistics
a 4 credit-hour course, and Spanish a 3 credit-hour course. If 4 grade points are
assigned for an A, 3 for a B, and 2 for a C, what is the weighted mean grade for the
semester? - Answer-276
Assume a student received the following grades for the semester: History, B; Statistics,
A; Spanish, C; and English, C. History and English are 8 credit-hour courses, Statistics
a 8 credit-hour course, and Spanish a 3 credit-hour course. If 4 grade points are
assigned for an A, 3 for a B, and 2 for a C, what is the weighted mean grade for the
semester? - Answer-2.89
A company reported that annual revenue increased from $528 million in 1998to $5,100
million in 2001. What is the geometric mean annual percent increase in international
passenger revenues - Answer-10.4
A bottling company offers three kinds of delivery service : instant, same day and within
5 days . The profit per delivery varies according to the kind of delivery. The profit for an
