{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# exam4sp07 - Exam 4 Spring 2007 1 Name Psych Stats Spring...

This preview shows pages 1–4. Sign up to view the full content.

Exam 4 Spring 2007 Name_________________________ Psych Stats Spring 2007 Brannick Exam 4 Instructions: Write your name and U number on the scantron. For section, put 1 or 2 if you are in Dan’s lab; put 3 or 4 if you are in Xian’s lab. Answer any 50 of 55 questions on the exam by bubbling in the best of the four alternatives given. For those questions you wish to omit, bubble in “e.” If you answer all 55, I will choose the last 5 for you, so it is in your interest to pick 5 and bubble in “e”. You can take the printed exam with you. Handy formulas: N X X = ; X s X X z - = A=(z*100)+500 T=(z*10)+50 z=(A-500)/100 z=(T-50)/10 A=10T 2 1 2 1 2 2 X X X X S S S + = - ; N s s X X 2 = 1 ) ( 2 2 - - = N X X s X ; 1 ) ( 2 - - = N X X s X pairs D pairs D D N S N SD S 2 = = t X X S X X = - - 1 2 1 2 t X S X = - μ D S D t μ - = N z z r Y X = ; X X S X X z - = X Y S S r b = ; X b Y a - = ; bX a Y + = ˆ - = 2 ) ( G i tot X X SS SS tot =SS b +SS w 2 ) ( A i w X X SS - = 2 ) ( G A g b X X N SS - = MS =SS/df; Df tot = df w +df b; df t = N-1; df w = N-k; df b = k-1 A W N MS q HSD α = W B obt MS MS F = 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Exam 4 Spring 2007 Critical values of t , alpha = .05, two-tails df t Df t 1 12.706 6 2.447 2 4.303 7 2.365 3 3.182 8 2.306 4 2.776 9 2.262 5 2.571 10 2.228 Critical values of F Numerator df: df B df W 1 2 3 4 5 5 5% 1% 6.61 16.3 5.79 13.3 5.41 12.1 5.19 11.4 5.05 11.0 10 5% 1% 4.96 10.0 4.10 7.56 3.71 6.55 3.48 5.99 3.33 5.64 12 5% 1% 4.75 9.33 3.89 6.94 3.49 5.95 3.26 5.41 3.11 5.06 14 5% 1% 4.60 8.86 3.74 6.51 3.34 5.56 3.11 5.04 2.96 4.70 2
Exam 4 Spring 2007 Section 1 1. A numerical summary of a population of people is called a(n) a. Correlation b. Experiment c. Parameter d. Statistic 2. A distribution is a collection of data about an attribute of interest. Such an attribute is called a __________ in research. 3. Descriptive and inferential statistics are both computed on a sample of data. The difference is that descriptive statistics concern only the ______, but inferential statistics also concern the ____________. 4. Statisticians are concerned both with study design and data analysis. Design refers to _____, and analysis refers to ________. 5. Consider the following formula: 1 ) ( 2 2 - - = N X X s X . In the formula, what is the label or name for 2 X s ? a. Estimated population variance b. Null hypothesis c. Population standard deviation d. Standard error of the mean

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 13

exam4sp07 - Exam 4 Spring 2007 1 Name Psych Stats Spring...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online