MATH 302 Week 2 Quiz | Assignment Help | American-public-university-system
Week
2 Knowledge Check Homework Practice Questions
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Question 1 of 20
The
population FTES for 2005–2006 through 2010–2011 was given in an updated
report. The data are reported here.
See Attached Excel for Data.
Mean:
____ Calculate the mean. Round to one decimal place.
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Question
2 of 20
The
population FTES for 2005–2006 through 2010–2011 was given in an updated
report. The data are reported here.
See Attached Excel for Data.
Standard
Deviation: ____ Calculate the standard deviation.
Round to one decimal place.
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Question 3 of 20
The
population FTES for 2005–2006 through 2010–2011 was given in an updated
report. The data are reported here.
See Attached Excel for Data.
Calculate
the third quartile. Round to two decimal places.
Third
Quartile: _____ (Right Answer)
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Question 4 of 20
Which of the following
statements are false regarding a boxplot?
A. The height of the box has no significance.
B. The length of the box equals the
range of the data. (Right Answer)
C. Boxplots can be used to either describe a single variable in a
data set or to compare two (or more) variables
D. The right and left of the box are the third and first quartiles
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Question
5 of 20
To
determine if Reiki is an effective method for treating pain, a pilot study was
carried out where a certified second-degree Reiki therapist provided treatment
on volunteers. Pain was measured using a visual analogue scale (VAS)
immediately before and after the Reiki treatment (Olson & Hanson, 1997).
Higher numbers mean the patients had more pain.
Use the
box-and-whiskers plots of the before and after VAS ratings to determine if the
Reiki method was effective in reducing pain. Choose the best response
from the options below.
https://edge.apus.edu/access/content/attachment/26d91c0f-cb52-40cf-a9fd-f26d7a251cda/Tests%20_%20Quizzes/43101117-45b0-4c4d-8064-d63f02e5f25a/WK2BoxPlotReikiQ6.png
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A.
No, since there were outliers for the after treatment measurements.
B. Yes, the treatment was effective since
all 3 quartiles for the after treatment measurements were smaller than the
before treatment measurements. (Right Answer)
C. Yes, since there were outliers for the
after treatment measurements.
D. No, since there were more people in the
before treatment measurements that had a higher pain scale.
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Question 6 of 20
Suppose that a histogram of a
data set is approximately symmetric and bell shaped. Approximately what
percent of the observations are within two standard deviations of the mean?
A. 68%
B. 99.7%
C. 95%
D.50%
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Question 7 of 20
Sixty-five
randomly selected car salespersons were asked the number of cars they
generally sell in one week. Fourteen people answered that they
generally sell three cars; nineteen generally sell four cars; twelve
generally sell five cars; nine generally sell six cars; eleven generally sell
seven cars. Complete the table.
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Data
Value (# cars)
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Frequency
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Relative
Frequency Percent
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Cumulative
Relative Frequency
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3
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14
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21.5%
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4
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19
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29.2%
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5
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12
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18.46%
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6
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9
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13.8%
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7
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11
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16.9%
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What
does the Frequency column in the table sum to?
A. 65
B. 19.8
C. 14
D. 25
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Question
8 of 20
The
following data show the amount (in ounces) of beverage in randomly selected
16-ounce beverage cans.
See
Attached Excel for Data.
The mode of this data is
A. no mode
B. 16.1
C.
15.7
D. 15.6
E.15.8
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Question
9 of 20
The
following data show the lengths of boats moored in a marina. The data are
ordered from smallest to largest.
See
Attached Excel for Data
Identify the Median.
27
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Question 10 of 20
Cholesterol
levels were collected from patients two days after they had a heart attack
(Ryan, Joiner & Ryan, Jr, 1985). Find the mean. Round to 4
decimal places.
See Attached Excel for Data.
A. 253.9286
B. 235.2593
C. 236
D. 268
E.248.3245
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Question 11 of 20
The
following data show the average time (in hours) that a random sample of
8 students sleep per night.
See
Attached Excel for Data.
The
median time students sleep per night is ____hours. Do
not Round.
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Question 12 of 20
Cholesterol
levels were collected from patients two days after they had a heart attack
(Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 50th
percentile
See
Attached Excel for Data.
Retrieved from http://www.statsci.org/data/general/cholest.html .
Fill
in each of the values below:
50th
___
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Question
13 of 20
Cholesterol
levels were collected from patients two days after they had a heart attack
(Ryan, Joiner & Ryan, Jr , 1985). Use Excel to find the 38th
percentile. Round to two decimal places.
See
Attached Excel for Data.
Retrieved from http://www.statsci.org/data/general/cholest.html .
Fill
in each of the values below:
38th
percentile _____
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Question
14 of 20
A
sample of 8 cats found the following weights in kg. Use Excel to find the
weight for the 75th percentile.
See
Attached Excel for Data.
Hint:
Use =PERCENTILE.INC function in Excel or use textbook formula
(n+1)p/100
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A. 3.85 kg
B. 3.6875 kg
C. 3.7 kg
D. 3.65 kg
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Question
15 of 20
Eyeglassomatic manufactures
eyeglasses for different retailers. The number of lenses for different
activities is in table.
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Activity
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Grind
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Multicoat
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Assemble
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Make
Frames
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Receive
Finished
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Unknown
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Number
of lenses
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18872
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12105
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4333
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25880
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26991
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1508
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Grind means that they ground the
lenses and put them in frames, multicoat means that they put tinting or
scratch resistance coatings on lenses and then put them in frames, assemble
means that they receive frames and lenses from other sources and put them together,
make frames means that they make the frames and put lenses in from other
sources, receive finished means that they received glasses from other
source, and unknown means they do not know where the lenses came from. If
you were making a pare to graph in Excel what would be the first label
name?
A. Grind
B. Assemble
C. Unknown
D. Received Finished
E. Make Frames
F.Multicoat
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Question 16 of 20
The following graph represents a
random sample of car models driven by college students. What percent of
college students drove a Nissan?
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A. 12%
B. 10%
C. 24%
D. 20%
E. 40%
Question 17 of 20
The Australian
Institute of Criminology gathered data on the number of deaths (per 100,000
people) due to firearms during the period 1983 to 1997. The time-series
plot is below. What year had the lowest rate of deaths?
Retrieved
from http://www.statsci.org/data/oz/firearms.html.
A. 1983
B. 1997
C. 1985
D. 1989
Question 18 of 20
A scatterplot allows
one to see:
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A. whether there is
any relationship between two variables
B. what type of
relationship there is between two variables
C. Both (a) and (b)
are correct
D. Neither (a) nor (b)
is correct
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Question 19 of 20
The graph below is for pulse rates
before and after exercise.
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Before
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Pulse
Rates
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After
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9
8 8 7 6 5 2
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6
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9
8 8 8 6 5 5 5 1 1 0 0
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7
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8
8 7 5 4 2
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8
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5
6 6 7 8 9
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4
0
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9
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0
1 1 2 3 4 5 5 6 8
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4
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10
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0
1 4 6 7
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11
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6
7
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12
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4
5 8
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What was the fastest pulse rate of
the before exercise group?
Question 20 of 20
The following data
show the amount (in ounces) of beverage in randomly selected 16-ounce beverage
cans. Create a Stem-Leaf plot for these data. The key is 15|2 = 15.2.
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15.8
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16.1
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15.2
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14.8
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15.8
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15.9
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16.0
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15.5
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16.1
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15.7
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Using
information from the plot you’ve developed, answer the following two questions.
If rounding is necessary, round to one decimal place.
1.
What is the minimum observed amount (in ounces) of beverage in a can?
2. In your Stem-Leaf plot, what is the maximum Stem data value?
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