AMU MATH 125 week 7 test answers American Military University
AMU MATH 125 Test Week 7 answers
AMU MATH 125 Test Week 7 question 1
The campus dining hall is considering replacing the soft-serve ice cream machine with a “slushie” machine. The student council wants to survey 100 students, so they randomly select 10 class sections and survey all the students in those 10 classes. Determine the type of sample that is generated:
A.random
B.stratified
C.systematic
D.cluster
AMU MATH 125 Test Week 7 Question 2
A campus book store recorded the subject for textbooks purchased during a three hour period on the first day of class. (R = Religion, C = Chinese, S = Science, N = Nutrition). Construct a frequency distribution for the data.
A.
B.
C.
D.
AMU MATH 125 Test Week 7 Question 3
The ages of 40 community college students were gathered. Construct a frequency distribution for the data using five classes.
A.
B.
C.
D.
AMU MATH 125 Test Week 7 Question 4
The grades on a college math exam are shown below. Construct a stem and leaf plot for the data.
A.
B.
C.
D.
AMU MATH 125 Test Week 7 Question 5
The GPAs of 20 students are given below. Construct a stem and leaf plot for the data using whole numbers as stems and the decimals as leaves.
A.
B.
C.
D.
Get Assistance now for AMU MATH 125 test answers Select whether descriptive or inferential statistics is
being use: A recent study showed that drinking caffeine can lower blood
pressure. A.descriptive
statistics is used since there is a description of the data B.inferential
statistics is used since an inference is made C.descriptive
statistics is used since an inference is made D.inferential
statistics is used since there is a description of the data. Data was gathered regarding the number of stray animals
impounded by the humane society within a given year as follows. Which of the
following conclusions could be made based on the following bar graph, showing
the number of strays on the vertical axis: A.More cats than any
other animal were impounded. B.There seem to be
more stray cats this year than last year. C.More people have
pet cats than pet dogs in this city. D.The data is wrong.
Everyone knows that there are more stray dogs than stray cats. The following pie chart represents the frequency
distribution the number of freshmen, sophomores, juniors, and seniors who smoke
for a certain high school. Which of the following conclusions could you make
based on this pie chart: A.35% of the
students who smoke are seniors at this high school. B.About 25% of all
the students in the high school smoke. C.There are about
the same number of juniors and seniors at this high school. D.The seniors should
be better role models for the freshman and quit smoking. Fifty ten-year-olds were monitored to determine the number
of hours per week they spent watching television, surfing the net, and playing
video games. The results were used to obtain following histogram. Which of the
following conclusions could you make based on this chart? A.Most of the
ten-year-olds spent between 20-34 hours watching television, surfing the net or
playing video games per week. B.There are zero
ten-year-olds who spent between 35-39 hours watching television, surfing the
net or playing video games per week. C.Most of the
ten-year-olds spent between 15-19 hours watching television, surfing the net or
playing video games per week. D.Fewer than eleven
ten-year-olds spent between 20-29 hours watching television, surfing the net or
playing video games per week. Select the type of graph that would most appropriately
represent the given data: Trend over last 20 years in ridership on public
transportation A.histogram B.time series graph C.bar graph D.pie chart Find the mean, median, mode, and midrange for the data
provided. The data shows hours spent at work for a group of men. A.mean: 45, median:
47.025, mode: 45, midrange: 33.4 B.mean: 45, median:
47.025, mode: 48, midrange: 33.4 C.mean: 47.025, median:
45, mode: no mode, midrange: 48 D.mean: 47.025,
median: 48, mode: no mode, midrange: 48 Find the mode: 5 8 2 3 10 4 28 6 17 22 A.10.5 B.7 C.No mode D.8 For the following situation, select the measure of average
(mean, median, mode or midrange) that was probably used to make this
conclusion: People who live in a certain city typically fill up their cars
every 10 days. A.midrange B.median C.mean D.mode Find the range, variance, and standard deviation for the
given data. The table below shows the average points scored per game by several
intramural softball teams. Round to one decimal place. A.range: 11.8,
variance: 16.8, standard deviation: 4.1 B.range: 10,
variance: 20.1, standard deviation: 4.5 C.range: 10,
variance: 16.8, standard deviation: 4.1 D.range: 11.8,
variance: 20.1, standard deviation: 4.5 Kate scored in the 25th percentile rank on an exam. If 200
students took the exam, how many students scored lower than Kate? A.51 B.50 C.48 D.49 Twelve students took a placement exam with the following
results: 90 63 99 71 74 93
38 85 47 51 55 81 What is the percentile rank of 90? Round to the nearest
percentile. A.0th percentile B.75th percentile C.8th percentile D.25th percentile If a student’s rank in a class of 300 students is 66, find
the student’s percentile rank. A.76 B.78 C.77 D.79 Find Q1, Q2, and Q3 for the data set below: 5.5, 2.1, 6.9, 3.2,
3.0, 4.8, 2.2,
5.1, 2.0, 3.5 A.Q1 = 2.2 Q2 = 3.35 Q3 = 5.1 B.Q1 = 2 Q2 = 3 Q3 = 5 C.Q1 = 2.15 Q2 = 3 Q3 = 5.25 D.Q1 = 2 Q2 = 3.35 Q3 = 5.4 Assume a data set is normally distributed with mean 17 and
standard deviation 2.5. If the data set contains 40 data values, approximately
how many of the data values will fall within the range 14.5 to 19.5? A.38 B.12 C.16 D.27 Assume a data set is normally distributed with mean 115 and
standard deviation 15. If the data set contains 400 data values, approximately
how many of the data values will fall within the range 85 to 145? A.273 B.110 C.382 D.78 Find the area under the normal distribution curve between z
= 0 and z = 0.90. A.0.225 B.0.316 C.0.242 D.0.816 Find the area under the normal distribution curve between z
= 0 and z = –0.30. A.0.118 B.0.487 C.0.618 D.0.020 Find the area under the normal distribution curve between z
= –1.65 and z = 2.45. A.0.451 B.0.042 C.0.944 D.0.493 Find the area under the normal distribution curve to the
right of z = –1.55. A.0.939 B.0.439 C.0.061 D.–0.439 Find the area under the normal distribution curve to the
left of z = 0.30. A.–0.118 B.0.618 C.0.118 D.0.382 AMU MATH 125 Test Week 7 Question 26 The average hourly wage of employees of a certain company is
$10.60. Assume the variable is normally distributed. If the standard deviation
is $4.54, find the probability that a randomly selected employee earns less
than $6.97. A.0.225 = 22.5% B.0.316 = 31.6% C.0.212 = 21.2% D.0.193 = 19.3% The average hourly wage of employees of a certain company is
$14.24. Assume the variable is normally distributed. If the standard deviation
is $4.10, find the probability that a randomly selected employee earns less
than $6.86. A.0.049 = 4.9% B.0.017 = 1.7% C.0.036 = 3.6% D.0.14 = 14.0% The average selling price of homes in a certain city is
$365,300. Assume the variable is normally distributed with a standard deviation
of $68,400. If 497 homes are for sale, how many homes will sell for more than
$317,420? A.114 homes B.377 homes C.317 homes D.237 homes An aptitude test has a mean of 300 and a standard deviation
of 40. The test scores are normally distributed. If 1000 people take the test,
find the number of people who will score between 240 and 336. A.125 B.875 C.749 D.251 Suppose the average size (in square feet) of homes in a
certain region is 1534. Assume the variable is normally distributed with
standard deviation 160. If a person in the region was intending to build a 1718
square foot home but downsized and built a 1166 square foot home, what was the
change in percentile rank from the original plan to the actual home that was
built? A.The change in
percentile rank is 98. B.The change in
percentile rank is 11. C.The change in
percentile rank is 75. D.The change in percentile rank is 86. Get answers now
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