CUNY DATA205 Quiz 1 Chapters 1-2 Latest 2019 JULY Question # 00603541 Subject: Education Due on: 08/09/2019 Posted On: 08/09/2019 08:30 AM Tutorials: 1 Rating: 5.0/5

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

TABLE 2.2 AGES OF RESPONDENTS
Class Intervals	Frequency	Percentages
?18-23	5	?
24-29	21	?
?30-40	10	?
TOTAL	36

A possible
problem with Table 2.2 is that

Answers:

a. class
intervals overlap.

b. class
intervals are exhaustive.

c. class
intervals are too large.

d. class intervals are unequal in size.

Question
17Cumulative frequencies and cumulative percentages allow a researcher to

Answers:

a. be sure
the column totals are correct.

b. tell at a glance how many cases fall above
or below a given category.

c. show the
accuracy of his or her findings.

d. All of
the above

Question
18For a single variable measured at the nominal level, an appropriate graph
would be a

Answers:

a.
frequency polygon.

b.
histogram.

c.
bivariate table

d. pie chart.

Question
19Frequency distributions may be compiled for variables measured at which
level?

Answers:

a.Nominal

b. Ordinal

c.
Interval-ratio

d. All of the above

Question
20Histograms and line charts or frequency polygons are used with data measured
at the

Answers:

a. ordinal
level.

b. nominal
level.

c. any
level.

d. interval-ratio level.

Question
21Pie charts show the frequency distribution of

Answers:

a. one
variable.

b. two
variables.

c. three or
more variables.

d. Any of
the above

Question 22

The
homicide rate for a city is reported as 23.89. This means that

Answers:

a. For
every 100,000 people in the population there were 23.89 homicides.

b. for
every homicide, there were 23.89 victims.

c. There
was an average of 23.89 homicides each month.

d. The
homicide rate is rising.

Question
23?The purpose of univariate descriptive statistics is to

Answers:

a. ?combine
nominal and discrete variables.

b.
?summarize relationships between many variables.

c. ?display
the essential meaning of variables measured at the interval-ratio level.

d. ?summarize a single variable.

Question
24When working with a very small number of cases, it is usually preferable to
report

Answers:

a.
fractions.

b. actual frequencies.

c.
percentages.

d.
proportions.

Question
25Which of the following is an impossible value for a percentage?

Answers:

a. 0.0%

b. 0.05%

c.
47.458923%

d. 110.00%