Most colleges admit students based on their achievements in a number of different
areas. The total SAT score achieved by a student is an example of a ________
numerical variable.
TABLE 11-10
An agronomist wants to compare the crop yield of 3 varieties of chickpea seeds. She
plants all 3 varieties of the seeds on each of 5 different patches of fields. She then
measures the crop yield in bushels per acre. Treating this as a randomized block design,
the results are presented in the table that follows.
Referring to Table 11-10, the agronomist decided to compare the 3 treatment means by
using the Tukey multiple comparison procedure with an overall level of significance of
0.01. How many pairwise comparisons can be made?
Suppose A and B are events where P(A) = 0.4, P(B) = 0.5, and P(A and B) = 0.1. Then
P(A or B) = ________.
TABLE 13-4
The managers of a brokerage firm are interested in finding out if the number of new
clients a broker brings into the firm affects the sales generated by the broker. They
sample 12 brokers and determine the number of new clients they have enrolled in the
last year and their sales amounts in thousands of dollars. These data are presented in the
table that follows.
Referring to Table 13-4, the managers of the brokerage firm wanted to test the
hypothesis that the population slope was equal to 0. At a level of significance of 0.01,
the null hypothesis should be ________ (‘rejected’ or ‘not rejected’).
TABLE 2-11
The ordered array below resulted from selecting a sample of 25 batches of 500
computer chips and determining how many in each batch were defective.
Defects
Referring to Table 2-11, if a frequency distribution for the defects data is constructed,
using “0 but less than 5” as the first class, the frequency of the “20 but less than 25”
class would be ________.
TABLE 2-13
Given below is the stem-and-leaf display representing the amount of detergent used in
gallons (with leaves in 10ths of gallons) in a day by 25 drive-through car wash
operations in Phoenix.
Referring to Table 2-13, construct a cumulative percentage distribution for the detergent
data if the corresponding frequency distribution uses “9.0 but less than 10.0” as the first
class.
