Question
DATA205 Introductory Analytics (QC)
Quiz 1 Chapters 1-2
Question 1A discrete variable cannot be
Answers:
a. observed.
b. multiplied.
c. added.
d. subdivided.
Question 2A researcher has numbered all 50 states from 1 to
50 and has calculated a mean of 17.43 for the variable “state of
birth.”
is interval-ratio and the mean is an appropriate and useful
statistic in this case.
Answers:
a. Since the variable is ordinal, we should treat the value
of the mean with great caution.
b. The variable is interval-ratio and the mean is an
appropriate and useful statistic in this case.
c. Since this variable is discrete, the mean should not be
computed.
d. Since the variable is nominal, the mean makes no
sense.
Question 3According to the “Wheel of Science,” research
projects begin
Answers:
a. with an hypothesis.
b. at any stage on the Wheel.
c. with data.
d. with theory.
Question 4An hypothesis states, in part, that “income
increases as education increases”. In this statement, education is
Answers:
a. the secondary variable.
b. the dependent variable.
c. the independent variable.
d. the hypothetical variable.
Question 5Categories of nominal level variables should be
everything except
Answers:
a. mutually exclusive to avoid ambiguity in classifying
cases.
b. exhaustive so that every case fits into a category.
c. relevant to the research goals.
d. All of the above
Question 6Data is the same thing as
Answers:
a. statistics.
b. proof.
c. information collected in numerical form.
d. information collected in any form.
Question 7If a researcher summarizes the age of 1,000 people
by calculating the average age, she is using
Answers:
a. data reduction.
b. an incorrect hypothesis.
c. a qualitative technique.
d. non-empirical reasoning.
Question 8In addition to saying that one case is different
from another, the ordinal level of measurement allows us to
Answers:
a. put cases in general categories.
b. measure the distance between high and low.
c. say that one case is more or less than another.
d. calculate meaningful averages of variables.
Question 9In time, the ____________ variable precedes the
_____________ variable.
Answers:
a. dependent, independent
b. discrete, continuous
c. independent, dependent
d. hypothetical, theoretical
Question 10On a test, the numbers used to identify the
questions would be __________ in level of measurement while the
number of correct responses would be _____________.
Answers:
a. ordinal, nominal
b. nominal, interval-ratio
c. continuous, discrete
d. interval-ratio, nominal
Question 11When using interval-ratio data, the distance
between the scores is
Answers:
a. always two units.
b. exactly defined.
c. not always clear.
d. unequal.
Question 12Which of the following is a continuous variable?
Answers:
a. Number of times you have changed residences within the
last five years
b. Number of meals you consumed yesterday
c. Number of children
d. Time spent watching TV
Question 13Which of the following is a discrete variable?
Answers:
a. Height
b. Age
c. Number of children
d. Miles per gallon
Question 14?A _____ is the number of times a phenomena occurs
divided by the total possible occurrences.
Answers:
a. ?histogram
b. ?ratio
c. ?rate
d. ?frequency distribution
Question 15A police department reports that the number of
reported rapes in their jurisdiction increased by 100% over the
past decade. This means that the number of reported rapes today is
Answers:
a. equal to the number 10 years ago plus 50%.
b. double the number 10 years ago.
c. actually about the same as 10 years ago.
d. triple the number 10 years ago.
Question 16
.
Other samples, services and questions:
When you use PaperHelp, you save one valuable — TIME
You can spend it for more important things than paper writing.
