Liberty University MATH 201
Project 2 Discussion Board Forum 1 solution answers plagiarism free
Thread:
For this assignment, you will use
the Project 2 Excel Spreadsheet to answer the questions below. In each question, use
the spreadsheet to create the graphs as described and then answer the question.
Put all of your answers into a thread posted in Discussion Board Forum
1/Project 2.
This course utilizes
the Post-First feature in all Discussion Board Forums. This means you will only
be able to read and interact with your classmates’ threads after you have
submitted your thread in response to the provided prompt. For additional information
on Post-First, click here for a tutorial. This is intentional. You must use your own work
for answers to Questions 1–5. If something happens that leads you to want to
make a second post for any of your answers to Questions 1–5, you must get
permission from your instructor.
- A. Create
a set of 5 points that are very close together and record the standard
deviation. Next, add a sixth point that is far away from the original 5
and record the new standard deviation.
What
is the impact of the new point on the standard deviation? Do not just give a
numerical value for the change. Explain in sentence form what happened to the
standard deviation. (4 points)
B.
Create
a data set with 8 points in it that has a mean of approximately 10 and a
standard deviation of approximately 1. Use the second chart to create a second data
set with 8 points that has a mean of approximately 10 and a standard deviation
of approximately 4. What did you do
differently to create the data set with the larger standard deviation? (4 points)
- Go
back to the spreadsheet and clear the data values from Question 1 from the
data column and then put values matching the following data set into the
data column for the first graph. (8
points)
50,
50, 50, 50, 50.
Notice
that the standard deviation is 0. Explain why the standard deviation for this
one is zero. Do not show the calculation. Explain in words why the standard
deviation is zero when all of the points are the same. If you don’t know why,
try doing the calculation by hand to see what is happening. If that does not
make it clear, try doing a little research on standard deviation and see what
it is measuring and then look again at the data set for this question.
- Go
back to the spreadsheet one last time and put each of the following three
data sets into one of the graphs. Record what the standard deviation is
for each data set and answer the questions below.
Data set 1: 0, 0, 0, 100, 100, 100
Data set 2: 0, 20, 40, 60, 80, 100
Data set 3: 0, 40, 45, 55, 60, 100
Note
that all three data sets have a median of 50. Notice how spread out the points
are in each data set and compare this to the standard deviations for the data
sets. Describe the relationship you see between the amount of spread and the
size of the standard deviation and explain why this connection exists. Do not
give your calculations in your answer—explain in sentence form. (8 points)
For
the last 2 questions, use the Project 1 Data Set.
4.
Explain what an outlier is.
Then, if there are any outliers in the Project 1 Data Set, what are they? If
there are no outliers, say no outliers. (4
points)
5.
Which 4 states have temperatures
that look to be the most questionable or the most unrealistic to you? Explain
why you selected these 4 states. For each state, give both the name and the
temperature. (4 points)
Replies:
After you have
submitted your thread, you will be able to see your classmates’ threads. Find 2
classmates who disagreed with at least some part of your answers to Questions 4
and 5 and explain why your answers are correct. If you change your mind about your
answers for Questions 4 and 5, explain what you were thinking originally as well
as what you think now and why. Replies must be at least 50 words each. (8 points)
Submit your thread by
11:59 p.m. (ET) on Saturday of Module/Week 3. Submit your replies to 2
classmates’ threads by 11:59 p.m. (ET) on Monday of the same module/week.
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