10. Identify each of the following variables as qualitative or
quantitative.
11. Each month interviewers visit about 69,000 of the 93 million
households in the region and question the occupants over 18 years of
age about their educational status. Their responses enable the
interviewers to estimate the percentage of people in the labor force
who are college educated. Compare parts a through c.
12. Complete the table to the right?
13. In one university, language professors incorporated a 10-week
extensive program to improve students’ Japanese reading
comprehension. The professors collected 283 books originally written
for Japanese children and required their students to read at least 40 of
them as part of the grade in the course. The books were categorized
into reading levels (color-coded for easy selection) according to
length and complexity. Complete parts a through c.
14. A group of marketing professors asked every fourth adult entrant
to a mall to participate in a study. A total of 119 shoppers agreed to
answer the question, “Made locally” means what percentage of local
labor and materials?” The responses of the 119 shoppers are
summarized in the table to the right. Complete parts a through c
below.
15. Graph the relative frequency histogram for the 300 measurements
summarized in the relative frequency table to the right.
16. If jobs arrive at a particular work center at a faster rate than they
depart, the work center impedes the overall production process and is
referred to as a bottleneck. The data in the table were collected by an
operations manager for use in investigating a potential bottleneck
work center.
17. A data set contains the observations 3, 5, 4, 2, 3. Find the
following values.
18. Calculate the mean and Median of the following grade point
averages.
2.5
2.9
3.6
2.6
3.2
3.7
19. Five banks have been ranked by the amount charged to credit and
debit cards issued by the banks. The table to the right gives the total
amount charged in 2007 for the top ranked banks.