## Statistics- Discussion Board Forum 1/Project 2 Instructions

Discussion Board Forum 1/Project 2 Instructions

Standard

Deviation and Outliers

Thread:

For

this assignment, you will use the Project 2 Excel Spreadsheet to answer the

questions below.

Use the spreadsheet to

create the graphs as described in each question and then answer the question.

Put all of your answers

into a post in the Project 2 Discussion Board Forum.

This course will be utilizing the Post-First feature. You will not

be able to see your classmatesâ posts until after you have made your own post.

This is intentional. You must use your own work for answers to questions 1â5.

If something happens that leads you to want to make a second post for any of your

answers to questions 1â5, 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 what happened to the standard deviation

in words. (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 donât 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 answerâexplain

in words. (8 points)

For

the last 2 questions, use the Project 1 Data set that is found inCourse Content >> Course

Guides and Assignment Instructions >> Assignment Instructions in

Blackboard.

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)

Which 4

temperatures in the data set look to be the most questionable or the most

unrealistic to you? Explain why you selected these 4 points. (4 points)

Replies:

After you have made your post, you will be able to see your classmatesâ

posts. Find 2 classmates who disagreed with at least some part of at least 1 of

your answers to questions 4 and 5 and explain why your answers are correct. If

after reading some of your classmatesâ posts, you change your mind about the

right answers for questions 4 and 5, explain what you were thinking originally

as well as what you think now and why.

(8 points)

Submit your answers to these questions by 11:59 p.m. (ET) on Saturday

of Module/Week 3. Submit your 2 replies of at least 50 words each by 11:59 p.m.

(ET) on Monday of Module/Week 3.

**CLICK HERE TO ORDER A SIMILAR PAPER**

We pride ourselves in writing quality essaysCLICK HERE TO CONTACT US