Download 1) Classifying the fruit in a basket as apple, orange, or banana, is an

1) Classifying the fruit in a basket as apple, orange, or banana, is an
example of the ___________ level of measurement.
D.
nominal
2) Which of the following best defines the relationship between
confounding, dependent, and independent variables?
B.
The confounding variable influences the dependent variable, but is
not separated from the independent variable.
3) If a researcher manipulates one of the variables and tries to
determine how the manipulation influences other variables, the
researcher is conducting a(n)
B.
experimental study.
4) In an ungrouped frequency distribution of the average age of high
school graduates, what would be the boundaries for the class of
graduates who were reported to be 18 years old?
B.
17.5–18.5 years old
5) For the class 10 – 18, the upper class limit is
A.
18.5
6) What are the boundaries of the class 12-19?
D.
11.5 and 19.5
7) An automobile dealer wants to construct a pie graph to represent
types of cars sold in July. He sold 72 cars, 16 of which were
convertibles. How many degrees should be used for the convertibles
section?
B.
80°
8) A television station interviews five movie viewers after the first
showing of a movie. After finding out that all five enjoyed the movie
very much, the reporter states that this movie will definitely be a big
hit. This is an example of ____________________.
C.
suspect samples
9) Karen is constructing a pie graph to represent the number of
hours her classmates do homework each day. She found that 8 of 24
classmates did homework for 3 hours each day. In her pie graph,
this would represent how many degrees?
C.
120°
10) An advertisement for a motorcycle states that it is 15% more
powerful. This is an example of _________________.
A.
detached statistics
11) A pie graph is NOT useful in showing which of the following
characteristics of a data set?
D.
Frequency changes over time
12) In an advertisement for a car, a driver is shown driving expertly
through a difficult road course. At the bottom of the ad, the
following is included in small print "Professional driver on a closed
course." Which of the following choices best describes this misuse of
data?
B.
Implied connections
13) Find the mean of the following data set: 9, 4, 7, 2, 13
C.
7.0
14) Which of the following is the properly rounded mean for the
given data? 7, 8, 13, 9, 10, 11
D.
9.7
15) Find the mode for the following data: 5, 4, 3, 4, 5, 6, 5, 5, 3, 4
C.
5
16) Given that the variance for a data set is 1.20, what is the
standard deviation?
B.
1.10
17) The grades for the trigonometry exam are listed below. Find the
range. 85, 76, 93, 82, 84, 90, 75
A.
18
18) Find the range of the set of values 6, 15, 3, 10, and 5.
B.
12
19) A gumball machine contains 300 grape-flavored balls, 400
cherry-flavored balls, and 500 lemon-flavored balls. What is the
probability of getting 1 grape ball, 1 cherry ball, and 1 lemon ball if
each ball was removed and then replaced before choosing the next
from the machine?
C.
0.0347
20) If one card is drawn from an ordinary deck of cards, what is the
probability that the card will be an ace, a king of hearts, or a spade?
C.
17/52
21) Four statistics professors and six chemistry professors are
available to be advisors to a student organization. The student
organization needs two of the professors to be advisors. If each
professor has an equal chance of being selected, what is the
probability that both professors are chemistry professors?
D.
0.333
22) The statement, "The probability that a certain sports team will
win its next game is about 60%," is an example of
C.
subjective probability.
23) What is the set of all possible outcomes of a probability
experiment?
D.
The sample space
24) What type of probability uses a knowledge of sample spaces as
opposed to experiments to determine the numerical probability that
an event will occur?
B.
Classical probability
25) Which of the following properties distinguishes the standard
normal distribution from other normal distributions?
B.
The mean is 0 and the standard deviation is 1.
26) Find the area under the standard normal distribution curve
between z = 0 and z = -2.16.
C.
0.4846
27) The number of standard deviations a particular X value is from
the mean is commonly referred to as ________.
B.
z
28) For a normal distribution curve with a mean of 21 and a
standard deviation of 5, which range of the variable defines an area
under the curve corresponding to a probability of approximately
68%?
A.
From 16 to 26
29) If a normal distribution has a mean of 20 and a standard
deviation of 10, then
D.
the median is 20 and the mode is 20.
30) On an easy test, the mean score was 96 out of a possible 100
points. The distribution of the test scores is likely to be
A.
negatively skewed.
31) Sampling techniques are often used
D.
when the population is too large to be analyzed.
32) If all possible samples of a specific size have the same chance of
being selected, what type of sampling is being used?
D.
Random sampling
33) Which of the following methods will give a truly random
sampling of the general population?
A.
Identify all the members of the population, and then select the
desired number randomly from among them.
34) A pollster wanted to determine how much support a new library
tax would have in a major metropolitan area. The metro area is
divided into regions, Southeast, Southwest, Northeast, Northwest,
and Central, and 100 voters in each region are surveyed. What type
of sampling technique is being employed?
B.
Stratified sampling
35) A small-town politician is running for the district council seat. If
the politician decides to poll three blocks in the district to determine
his chance of winning the seat, what type of sampling is being used?
D.
Cluster sampling
36) A statistics teacher taught Introductory Statistics to a large
lecture class of 200 students. She wanted to estimate the average
on the first examination by selecting every eighth student's test
score and finding the average of these scores. What type of sampling
technique is being employed?
A.
Systematic sampling