Textbook Notes (369,082)
Canada (162,376)
Psychology (4,934)
Psychology 1000 (1,640)
Dr.Mike (707)

Appendix - Statistics in Psychology.docx

2 Pages

Course Code
Psychology 1000

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Statistics in Psychology Descriptive Statistics (Distribution)  Summarize and describe the characteristics of a set of scores  Frequency Distribution: how many participants received each score  Histogram: bar graph of frequency distribution Measures of Central Tendency  Distribution in terms of a single statistic that represents the sample as a whole  Mode - Most frequent but not the most representative  Mean – average affected by outliers  Median – midpoint of a ranked distribution unaffected by outliers Measures of Variability  Spread of scores in a distribution  Range: difference between highest and lowest scores  Deviation score (x): measures the distance between each score (X) and the mean (M)  Variance: degree of fluctuation of scores around mean (total x / # of x values) o z score – distance from the mean in standard deviation units  normally distributed with a mean of 0 and standard deviation of 1 o Total variance = accounted (independent variables) + not accounted (random, uncontrolled)  Standard deviation (S/SD): Square root of the variance *The best standard deviation is to have in o Low – narrow & peak between high and low o High – flat and more spread out The Normal Curve  Symmetrical bell-shaped curve that represents a theoretical distribution of scores in the population  The mean , median and mode have the same values  68% scores fall in between ±1 standard deviation of the mean  96% scores fall in between ±2 standard deviation  Almost all cases fall in between ±3 standard deviation  Purpose is to estimate the probability a given event wi
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.