MATH 1280 EXAM COMPLETE
QUESTIONS WITH CORRECT
SOLUTIONS||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||<<NEWEST VERSION>>
Number of tickets sold to a concert. - ANSWER ✓ quantitative/numeric
Favorite baseball team. - ANSWER ✓ qualitative/factor
Number of students enrolled at Evergreen Valley College. - ANSWER ✓
quantitative/numeric
Distance to the closest movie theater. - ANSWER ✓ quantitative/numeric
Number of competing computer spreadsheet software packages. - ANSWER ✓
quantitative/numeric
In Figure A you will find box plots for three sets of data. In Figure B are the
histograms for the same sets of data, but in a different order. Associate each box
plot with its relative histogram - ANSWER ✓ Box plot 1 → Histogram b, Box
plot 2 → Histogram a, Box plot 3 → Histogram c
Consider the box plots in Figure A. Which of the data has a smaller inter-quartile
range (IQR)? - ANSWER ✓ Box plot 3
For the next 3 question deal with the following data:
11.9, 11.0, 12.4, 16.9, 16.3, 13.3, 9.1, 17.0, 11.0, 9.3, 25.3, 17.4, 17.4 - ANSWER
✓
The median is equal to: - ANSWER ✓ 13.3
,The largest value in the data is an outlier: - ANSWER ✓ False
The smallest value in the data is an outlier: - ANSWER ✓ False
You read a research paper that applies to your industry, and it says when people
are given a list of facts about your product, they are more likely to buy your
product and that the different between the regular amount of sales and the sales
when people read the list of facts is 3 SDs. - ANSWER ✓ Can not tell because the
sample size is not given.
What is the lambda value for the Poisson distribution? - ANSWER ✓ 2
If we know the expectation is 2, what is the SD of the Poisson distribution? -
ANSWER ✓ sqrt(2)
Traffic at the airport changed recently - ANSWER ✓ qnorm(.99), mean=2,
sd=sqrt(2/6)
The mean weekly sales per employee at a nationwide store is normally distributed.
- ANSWER ✓ 0.13
The time between incoming customer service calls to computer-repair hotline.
Probability that calls will be less than 1 minute? - ANSWER ✓ .39
What is the probability that the mean of our sampling distribution will be greater
than 2.2 minutes? - ANSWER ✓ .26
Create an R data frame with the name "ex.2" that contains the data in the file
"ex2.csv" (Select the file name to download it).
Compute the standard deviation of each of the numeric variables. Among the
following, the variable with the largest standard deviation is: - ANSWER ✓
diastolic
Twenty-one randomly selected students were asked the number of pairs of
sneakers they owned. The number of pairs of sneakers owned by each student was
recorded in an R object by the name "x". The frequency table of the data "x" is:
> table(x) x 1 2 3 4 5 6 4 7 3 3 2 2
Based on this table compute: - ANSWER ✓
, sampl m an x - ANSWER ✓ 2.904762
The sample standard deviation (s) is - ANSWER ✓ 1.609496
The first quartile (Q1) is - ANSWER ✓ 2
The median is - ANSWER ✓ 2
The third quartile (Q3) is - ANSWER ✓ 4
The distribution is skewed to the left? (True or False) - ANSWER ✓ False
The relative frequency of the students that owned more than one but less than 5
sneakers is is - ANSWER ✓ 0.6190476
Following are the possible weights (in pounds) of some football team members.
232, 251, 257, 268, 238, 222, 265, 263, 252, 246, 253, 248, 256, 248, 230, 219,
224, 267, 259, 254, 254, 261, 248, 221, 252, 269, 269, 273, 273, 259, 251, 222,
248, 224 - ANSWER ✓
sampl m an x, - ANSWER ✓ 249.2941
The sample standard deviation (s) is - ANSWER ✓ 16.34019
The first quartile (Q1) is - ANSWER ✓ 240
The median is - ANSWER ✓ 252
The third quartile (Q3) is - ANSWER ✓ 260.5
The USC quarterback Matt Barkley weighed 220 pounds in the spring of 2010.
How many standard deviations above or below the mean was he in comparison to
the data given above? (Give the answer in the format x.xxx, without the plus/minus
sign) - ANSWER ✓ 1.792765
The following frequency table shows the lengths of 42 international phone calls
using a $5 prepaid calling card. The data was stored in an object by the name "x":
QUESTIONS WITH CORRECT
SOLUTIONS||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||<<NEWEST VERSION>>
Number of tickets sold to a concert. - ANSWER ✓ quantitative/numeric
Favorite baseball team. - ANSWER ✓ qualitative/factor
Number of students enrolled at Evergreen Valley College. - ANSWER ✓
quantitative/numeric
Distance to the closest movie theater. - ANSWER ✓ quantitative/numeric
Number of competing computer spreadsheet software packages. - ANSWER ✓
quantitative/numeric
In Figure A you will find box plots for three sets of data. In Figure B are the
histograms for the same sets of data, but in a different order. Associate each box
plot with its relative histogram - ANSWER ✓ Box plot 1 → Histogram b, Box
plot 2 → Histogram a, Box plot 3 → Histogram c
Consider the box plots in Figure A. Which of the data has a smaller inter-quartile
range (IQR)? - ANSWER ✓ Box plot 3
For the next 3 question deal with the following data:
11.9, 11.0, 12.4, 16.9, 16.3, 13.3, 9.1, 17.0, 11.0, 9.3, 25.3, 17.4, 17.4 - ANSWER
✓
The median is equal to: - ANSWER ✓ 13.3
,The largest value in the data is an outlier: - ANSWER ✓ False
The smallest value in the data is an outlier: - ANSWER ✓ False
You read a research paper that applies to your industry, and it says when people
are given a list of facts about your product, they are more likely to buy your
product and that the different between the regular amount of sales and the sales
when people read the list of facts is 3 SDs. - ANSWER ✓ Can not tell because the
sample size is not given.
What is the lambda value for the Poisson distribution? - ANSWER ✓ 2
If we know the expectation is 2, what is the SD of the Poisson distribution? -
ANSWER ✓ sqrt(2)
Traffic at the airport changed recently - ANSWER ✓ qnorm(.99), mean=2,
sd=sqrt(2/6)
The mean weekly sales per employee at a nationwide store is normally distributed.
- ANSWER ✓ 0.13
The time between incoming customer service calls to computer-repair hotline.
Probability that calls will be less than 1 minute? - ANSWER ✓ .39
What is the probability that the mean of our sampling distribution will be greater
than 2.2 minutes? - ANSWER ✓ .26
Create an R data frame with the name "ex.2" that contains the data in the file
"ex2.csv" (Select the file name to download it).
Compute the standard deviation of each of the numeric variables. Among the
following, the variable with the largest standard deviation is: - ANSWER ✓
diastolic
Twenty-one randomly selected students were asked the number of pairs of
sneakers they owned. The number of pairs of sneakers owned by each student was
recorded in an R object by the name "x". The frequency table of the data "x" is:
> table(x) x 1 2 3 4 5 6 4 7 3 3 2 2
Based on this table compute: - ANSWER ✓
, sampl m an x - ANSWER ✓ 2.904762
The sample standard deviation (s) is - ANSWER ✓ 1.609496
The first quartile (Q1) is - ANSWER ✓ 2
The median is - ANSWER ✓ 2
The third quartile (Q3) is - ANSWER ✓ 4
The distribution is skewed to the left? (True or False) - ANSWER ✓ False
The relative frequency of the students that owned more than one but less than 5
sneakers is is - ANSWER ✓ 0.6190476
Following are the possible weights (in pounds) of some football team members.
232, 251, 257, 268, 238, 222, 265, 263, 252, 246, 253, 248, 256, 248, 230, 219,
224, 267, 259, 254, 254, 261, 248, 221, 252, 269, 269, 273, 273, 259, 251, 222,
248, 224 - ANSWER ✓
sampl m an x, - ANSWER ✓ 249.2941
The sample standard deviation (s) is - ANSWER ✓ 16.34019
The first quartile (Q1) is - ANSWER ✓ 240
The median is - ANSWER ✓ 252
The third quartile (Q3) is - ANSWER ✓ 260.5
The USC quarterback Matt Barkley weighed 220 pounds in the spring of 2010.
How many standard deviations above or below the mean was he in comparison to
the data given above? (Give the answer in the format x.xxx, without the plus/minus
sign) - ANSWER ✓ 1.792765
The following frequency table shows the lengths of 42 international phone calls
using a $5 prepaid calling card. The data was stored in an object by the name "x":
