Part a)
1.
2. Correlation Coeficcient=-0.96322, R=-0.96322 last part of equation: (-9.63217/10)= -0.96322,
p-value= <0.0001
3.
Line of best fit equation: y=-0.202x+41.655
( xiX ) ( yiY ) 555
=
2
Calculate slope:
2750
( xi X )
Calculate y-intecept: b=Y-m
The information you provide here will be viewed only by your teacher.
Thank you.
1.
Name:_Allison Stewart_
2.
Major:_A.A. Liberal Arts for associates, International
Relations for bachelors
3.
School:_FLCC_
4.
What previous mathematics courses have you had
MAT 121 / Quiz #3 / 80 points
DIRECTIONS: Show your work to ensure partial credit or explain how you arrived at your
conclusion whenever appropriate.
1. To estimate the average number of minutes it takes a typical employee at H&R Block to
prepare a tax re
Quiz #4 80 points
DIRECTIONS: Show your work or explain how you arrived at your conclusion whenever
appropriate.
1. Minitab was used to construct the five number summary and boxplot below for a
sample of checkout times (measured in seconds) taken at Corne
1.
a. All customers in Wegmans between 8am and noon. Because whoever comes in
has the potential to buy something.
b. 200 customers that checked out in Wegmans.
c. Not random, it is convenience sampling. There is a time constraint and only the
first 200 we
1.)
a. The sample for these numbers came from a specific living situation: families in a
large, urban, apartment. These are three factors that can determine the family
size. You would need to determine where the typical American family lives or
gather dat
i.
ii.
iii.
9
Skewed Right
No frequency between 50-60 years, highest frequency between 20-30 years.
i.
Male occurs the most.
i.
no occurs more frequently.
i.
I would argue this graph is u-shaped (opposite to bell-shaped) because high
frequency data points
Quiz #5 - 80 points
DIRECTIONS:
Show your work or explain how you arrived at your
conclusion whenever appropriate.
1. Marvin is a safety inspector at a large industrial plant that has eight
divisions that do the same type of work. He recorded the number o
A)
Graph is skewed right. Outlier above 60 years. The mode would occur
around 20 years.
Summary statistics:
Column n
age
Mean
Variance
Std. dev.
Std. err. Median Range Min Max Q1 Q3
60 25.016667 73.101412 8.5499364 1.103792
B)
22.5
48
17
Lower fence= 5.5
2. A) Graph is skewed right because most of the data hits below 30 years. Outlier is after 60 years.
3. B) The male gender is the mode of this data, with 53.33%.
Summary statistics:
Column n Mean Variance Std. dev. Std. err. MedianRangeMinMaxQ1Q3
age
6025
a. i.) 2.08 hours. 22 hours of studying is 2.08 standard deviations above the
mean of 13.7 hours.
2213.7
=2.075
4
ii) -1.93 hours. Only 6 hours of studying is 1.93 standard deviations below
the mean.
613.7
=1.93
4
b. 119 students study between these hours
Susanna LaMarti
StatCrunch 1-3 Assignment
i.
What's the class width?
10
ii.What's the shape of the distribution for the
variable age?
Skewed right
iii.Describe any other distinctive features of the
distribution for the variable age.
The tail to the right
Susanna LaMarti
StatCrunch Assignment 3
Dotplot:
Question A: Describe any distinctive features, including the
shape, of the distribution for the variable age. (Third time is a
charm!)
This dot plot is skewed right. The tail of the plot is longer to the ri
StatCrunch Assignment #1 - Answers
2) Each graph is worth 2 points.
2i) What's the class width? The class width is 10 (20-10=5). (-2)
2ii) What's the shape of the distribu5on for the variable age? The distribu?on is skewed right.
(-2)
2iii) Describe
Quiz #2 - 80 points
DIRECTIONS: Be sure to clearly explain your thought process when answering each question,
especially if you hope to receive partial credit in the event that your solution is in some way
flawed.
1.
A study was done to determine the size
1. A study was done to determine the size of the typical American family. The number
of children per family was recorded for a random sample of 45 families living in a
large urban apartment building. (36 points)
3 2 3 2 2 1 1 0 0
2 1 3 4 2 3 0 4 1
3 2 2 2
Reintroducing the Gray Wolf to Central Idaho and Yellowstone National Park
Author(s): Edward E. Bangs and Steven H. Fritts
Source: Wildlife Society Bulletin (1973-2006), Vol. 24, No. 3, Predators (Autumn, 1996), pp. 402413
Published by: Wiley on behalf of
Quiz #2 - 80 points
DIRECTIONS: Be sure to clearly explain your thought process when answering
each question, especially if you hope to receive partial credit in the event that your
solution is in some way flawed. Please submit your file as .doc, .docx, .
Quiz #5 - 80 points
DIRECTIONS:
Show your work or explain how you arrived at your conclusion
whenever appropriate.
1. Marvin is a safety inspector at a large industrial plant that has eight divisions that do
the same type of work. He recorded the number o
Quiz #4 80 points
DIRECTIONS: Show your work or explain how you arrived at your conclusion whenever
appropriate.
1. Minitab was used to construct the five number summary and boxplot below for a
sample of checkout times (measured in seconds) taken at Corne
Quiz #7
DIRECTIONS: Show your work to earn partial credit.
1. The management of a large insurance company believes that workers are more
productive if they are happy with their jobs. To keep track of their 815 workers
satisfaction, the company regularly c
StatCrunch Assignment #1
1) Histogram
i.
ii.
iii.
Whats the class width?
10
Whats the shape of the distribution for the variable age?
Skewed Right
Describe any other distinctive features of the distribution for the variable age.
There are more students ag
Quiz #6 / 80 points
DIRECTIONS: Show your work or explain how you arrived at your conclusion
whenever appropriate.
1. In 2008 the stock market crashed. During this time, a survey of adult investors were
asked how often they tracked their portfolio. The ta
Written Assignment #2
Binomial Probability Distribution
Directions: Use StatCrunch or your calculator to complete each of the following. Be
sure to clearly explain your thought process (by showing your StatCrunch output or byhand calculations) when answer
StatCrunch Assignment #2
2.
Question A: Describe any distinctive features of the distribution for the variable age.
Be specific.
The data in this dotplot is Skewed Right because the mean of 25 is bigger than the
median of 22.5 and the right tail in the di
Written Assignment #3
Normal Probability Distribution
1. The diameters of Red Delicious apples in a certain orchard are normally distributed
with a mean of 2.63 inches and a standard deviation of 0.25 inches.
a. What percentage of the apples in the orchar
Quiz #1
1. The general manager of the grocery store Wegmans in Canandaigua, NY, wants to
know the average (typical) amount of time it takes for a customer to check out of his
grocery store. Last Saturday between the hours of 8 am and noon the manager, alo