apu math302 quiz 1 done on april 2015

| December 12, 2017

Question 1 of 20
1.0/ 1.0 Points
A variable is classified as ordinal if:
A.we track the
variable through a period of time
B.the data arise from
continuous measurements
C.there is a natural ordering of categories
D.there is no natural
ordering of categories

Question 2 of 20
1.0/ 1.0 Points
Which of the following indicates how many observations fall
into various categories?
A.The sample table
B.The tabulation
scale
C.The frequency table
D.The Likert scale

Question 3 of 20
1.0/ 1.0 Points
Find the z-score for each student and indicate which one has
a better relative position. An Art Major earned a grade of 46 on an exam with
f$ar{x}f$ = 50 and s = 5; A Theater
Major earned a grade of 70 on an exam with f$ar{x}f$ = 75 and s = 7.
A.The art major has a
higher relative position than the theater major.
B.Both students have
the same score.
C.The theater major has a higher relative
position than the art major.
D.The higher score
cannot be determined.

Question 4 of 20
1.0/ 1.0 Points
Which of the following is the graphical analog of a
frequency table?
A.The scatterplot
B.The time series
plot
C.The histogram
D.The contingency
table

Question 5 of 20
1.0/ 1.0 Points
Which of the following are the three most common measures of
central location?
A.Mean, variance, and
standard deviation
B.Mean, median, and mode
C.Mean, median, and
variance
D.Mean, median, and
standard deviation

Question 6 of 20
1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately
symmetric and “bell shaped”. Approximately, what percent of the
observations are within three standard deviations of the mean?
A.95%
B.99.7%
C.50%
D.68%

Question 7 of 20
0.0/ 1.0 Points
What type of
sampling is being employed if the population is divided into economic classes
and a sample is chosen from each economic class to be surveyed?

In
A.cluster sampling
B.systematic sampling

C.stratified sampling
D.random sampling

Question 8 of 20
1.0/ 1.0 Points
The length of the box in the boxplot portrays the
A.interquartile range
B.median
C.mean
D.range

Question 9 of 20
1.0/ 1.0 Points
What kind of relationship between x and y is demonstrated by
the scatter plot below?

A.A positive linear
relationship
B.No linear
relationship
C.This is not a
scatter plot
D.A negative linear relationship

Question 10 of 20
1.0/ 1.0 Points
A population includes:
A.only households
B.all objects of interest in a particular
study
C.only machines
D.only people

Question 11 of 20
1.0/ 1.0 Points
Suppose that a histogram of a data set is approximately
symmetric and “bell shaped”. Approximately what percent of the
observations are within one standard deviation of the mean?
A.99.7%
B.68%
C.95%
D.50%

Question 12 of 20
1.0/ 1.0 Points
The difference between the first and third quartile is
called the
A.mid range
B.interquartile range
C.unimodal range
D.interdependent
range

Part 2 of 3 – 2.0/
6.0 Points

Question 13 of 20
0.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

The histogram below represents scores achieved by 250 job applicants
on a personality profile.

The histogram below represents scores achieved by 250 job
applicants on a personality profile.
Sixty percent of the job applicants scored below what
value? Place your answer in the blank.
Do not use any stray symbols. For example, 123 would be a legitimate answer.
.30

Question 14 of 20
0.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

The following data represent the number of children in a
sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2.

Compute the median number of children. Place your answer,
rounded to two decimal places, in the blank. For example, 3.45 would be a
legitimate entry. 1.90

Question 15 of 20
0.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

The following data represent the number of children in a
sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2.

Compute the variance of the data. Place your answer, rounded
to two decimal places, in the blank. For example, 3.45 would be a legitimate
entry. 2.49

Question 16 of 20
1.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For scientific
notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

A sample of 150 students at a State University was taken
after the final business statistics exam to ask them whether they went partying
the weekend before the final or spent the weekend studying, and whether they
did well or poorly on the final. The following table contains the result.

Did Well on Exam Did Poorly on Exam
Studying for Exam 60 15
Went Partying 22 53
If the sample is a good representation of the population,
what percentage of the students in the population should we expect to spend the
weekend studying and do poorly on the final exam? Place your answer in the blank, rounded to 2
decimal places. Do not use a percentage sign (%). For example, 44.44 would be a
legitimate answer. 10.00

Question 17 of 20
1.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

The histogram below represents scores achieved by 250 job
applicants on a personality profile.

The histogram below represents scores achieved by 250 job
applicants on a personality profile.
Seventy percent of the job applicants scored above what
value? Place your answer in the blank. Do not use any stray symbols. For
example, 123 would be a legitimate answer.
20

Question 18 of 20
0.0/ 1.0 Points
Accepted characters: numbers, decimal point markers (period
or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000),
“E” or “e” (used in scientific notation). NOTE: For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where
“a” and “b” need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is
valid whereas {9i} is not.

A sample of 150 students at a State University was taken
after the final business statistics exam to ask them whether they went partying
the weekend before the final or spent the weekend studying, and whether they
did well or poorly on the final. The following table contains the result.

Did Well on Exam Did Poorly on Exam
Studying for Exam 60 15
Went Partying 22 53

If the sample is a good representation of the population,
what percentage of those who did poorly on the final exam should we expect to
have spent the weekend studying? Place
your answer in the blank, rounded to 2 decimal places. Do not use a percentage
sign (%). For example, 44.44 would be a legitmate answer. 20.00

Part 3 of 3 – 1.0/
2.0 Points

Question 19 of 20
0.0/ 1.0 Points
A histogram is skewed to the left (or negatively skewed) if
it has a single peak and the values of the distribution extend much further to
the right of the peak than to the left of the peak.
In
True
False

Answer Key: False
Question 20 of 20
1.0/ 1.0 Points
The number of car insurance policy holders is an example of
a discrete random variable

True
False

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