Exam 2 Formulas
s X2
s
2
pool
X X
2
n 1
SS SS 2
1
df1 df 2
tobt
X
sX
X
estimated d
sX
r2
sX
t2
t 2 df
s X1 X 2
t obt
s X2
n
s 2pool s 2pool
n
n
2
1
( X 1 X 2 ) ( 1 2 )
s X1 X 2
estimat
Difference between a baby skull and an adult skull.
To start with, a skull is a bony structure that forms the head in human skeleton. The skull
supports the structures of the head and also forms a cav
Independent-Samples t-Test Example 2 (IQ Drug) ANSWER KEY
You are a researcher interested in testing a new drug that is supposed to raise IQ for a day. You
administer the pill to one group of particip
Independent-Samples t-Test (Social Skills) Answer Key
A psychologist is examining the influence of an older sibling in the development of social skills. A sample
of 19 three-year-old children is obtai
PSYC 2301 Experimental Psychology
Review for Exam 2
1. How do you know when to use a z test versus a one-sample t test? A one-sample t test
versus a two-sample t test?
2. How are standard deviation an
Pearcey PSYC 3301 Spring 2017
Name _
Article Assignment #1 (25 points)
Submit your assignment in Dropbox on D2L by due date
Article Information:
Title: The Links Between Parenting Styles and Imposter
Independent-Samples t-Test Example 1 (Hand-Calculation vs SPSS) Answer Key
I predict that students who learn to calculate statistics by hand are better able to select the appropriate
statistical test
One-Sample t Test Example 3 (Scooby Doo Mysteries) ANSWER KEY
The national average number of mysteries solved by cartoon detectives is 1.6 per month.
Did Scooby Doo solve more mysteries per month duri
One-Sample t-Test Example 1 (Stats Ability) Answer Key
Does the statistics ability of KSU graduates differ from the national average? The average on the national
statistics exam is = 5.8.
Step 1. Stat
One-Sample t-Test Example 2 (Memory Booster) ANSWER KEY
A nutrition store in the mall is selling Memory Booster, which is a concoction of herbs and minerals that is
intended to improve memory performa