Exam 2 Formulas
SS SS 2
df1 df 2
t 2 df
s X1 X 2
s 2pool s 2pool
( X 1 X 2 ) ( 1 2 )
s X1 X 2
X1 X 2
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 cavity for the brain. However, there is an
infant skull an
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 participants and a placebo to a different group of participants
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 obtained. Half of these children had no siblings and the oth
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 and variance related?
3. Know that the numerator of the v
Pearcey PSYC 3301 Spring 2017
Article Assignment #1 (25 points)
Submit your assignment in Dropbox on D2L by due date
Title: The Links Between Parenting Styles and Imposter Phenomenon
Authors: Sijia Li, Jennifer L. Hughes, and S
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 to use than students who learn to calculate statistics
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 during the first year he was on television (1969) than the
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. State your hypotheses.
a. Is it a one-tailed or two-tailed
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 performance, but there is no good reason to think it couldn't p