NEED A STATISTICS METHODS IN PSYCHOLOGY EXPERT ONLY!!!!Showing your work (all steps) you took to solve each calculation problem, according to the method outlined in the ATTCHMENTSComplete the homework 5 from the worksheet below…can be hand written (and do not copy from coursehero or chegg) or can be in word documentYOU MUST DO IT THE WAY THE PROFESSOR HAS OUTLINED IN THE FORMULA SHEET BELOW…YOU CAN ONLY USE THE SYMBOLS HE HAS CHOSEN FOR THIS COURSE IN THE SHEET ATTAHCED

symbols.pdf

assignment_5.pdf

Don't use plagiarized sources. Get Your Custom Essay on

Complete Statistical Methods in Psychology Assignment

Just from $13/Page

formula_sheet.pdf

Unformatted Attachment Preview

X, Y

variables

n

number of people in a research group or sample

N

number of people in target population

?

rho (pronounced row)

S

sum (sigma)

µ

populational mean (pronounced mu)

M

sample mean (pronounced x bar)

a

alpha

ß

beta

=

greater than or equal to

=

less than or equal to

s

populational standard deviation (sigma)

s

sample standard deviation (also will see the symbol, SD)

±

plus/minus

Order of Mathematical Operations

1.

Parentheses (innermost to outermost)

Exponents

2.

3.

Multiplying/dividing

4.

Summation (S)

5.

Adding/subtracting

Example:

3(X2-2XY)(2+7X2+X)2+2

(X-Y)(Y-X2)

What order would you do the calculations?

If x = 2 & y = 3

PSYC 2317

Mark W. Tengler, M.S.

Assignment #5

Linear Regression

5.1

For the following set of data,

X

1

4

3

2

5

3

a.

b.

c.

Y

2

7

5

1

14

7

Compute the Pearson correlation. Determine if there is a relationship,

what type of relationship, and how strong or weak that relationship is, if

any relationship exists.

Find the linear regression equation for predicting Y from X (use the linear

regression equation formula #1 from class handout).

Use the regression equation that you derived (part b above) to compute the

predicted Y for each actual value of X. Compare the predicted Y scores to

the actual Y scores. Why is there a difference between the predicted Y

values and the actual Y values? How do you explain this difference?

Descriptive Statistics Formula Sheet

Sample

Population

Characteristic

statistic

Parameter

raw scores

x, y, . . . . .

X, Y, . . . . .

mean (central tendency)

M=

µ=

range (interval/ratio data)

?x

n

highest minus lowest value

deviation (distance from mean)

Deviation = (x – M )

Deviation = (X – µ )

average deviation (average

?(x – M )

=0

n

?(X – µ )

N

(? x)2

SS = ? x –

n

(? x)2

? x2 –

n = SS

s2 =

n-1

df

(? X)2

SS = ? X –

N

(? X)2

? X2 –

N

s2 =

N

distance from mean)

sum of the squares (SS)

(computational formula)

variance ( average deviation2 or

2

standard deviation )

(computational formula)

2

standard deviation (average

deviation or distance from mean)

(computational formula)

Z scores (standard scores)

s=

Z=

?X

N

highest minus lowest value

2

(? x)2

n

n-1

s=

x-M

deviation

=

s

stand. dev.

Z=

2

v? x –

mean = 0

standard deviation = ± 1.0

X = M + Zs

Area Under the Normal Curve

(? X)2

N

N

2

v? X –

X-µ

s

X = µ + Zs

-1s to +1s = 68.3%

-2s to +2s = 95.4%

-3s to +3s = 99.7%

Using Z Score Table for Normal Distribution

(Note: see graph and table in A-23)

for percentiles (proportion or %) below X

for positive Z scores use body column

for negative Z scores use tail column

for proportions or percentage above X

for positive Z scores use tail column

for negative Z scores use body column

to discover percentage / proportion between two X values

1. Convert each X to Z score

2. Find appropriate area (body or tail) for each Z score

3. Subtract or add areas as appropriate

4. Change area to % (area × 100 = %)

Regression lines

(central tendency line for all

points; used for predictions

only) formula uses raw

scores

b = slope

a = y-intercept

y = bx + a

(plug in x

to predict y)

b=

(? x)(? y)

n

(?

x)2

? x2 –

n

? xy –

a = My – bMx

where My is mean of y

and Mx is mean of x

SEest (measures accuracy of predictions; same properties as standard deviation)

Pearson Correlation Coefficient

(used to measure relationship;

uses Z scores)

r=

r=

(? x)(? y)

n

2

2

(?

x)

2 -(? y) )

v(? x2 –

y

)(?

n

n

degree x & ? ???? ?????h??

degree x & ? ???? ??????????

r2 = estimate or % of accuracy of predictions

? xy-

…

Purchase answer to see full

attachment

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.