WEEK 8

Question 1

describe what happens if A level is set high( 0.5)

Answer 1

• increases chance of type 1 error
• decreases chance of type 2 error

Question 2

describe what happens in A level is set too low ( 0.0005)

Answer 2

• decreases chance of type 1 error
• increases chance of type 2 error

Question 3

define statistical power

Answer 3

the ability to correctly reject the null hypothesis

Question 4

define type 1 and 2 errors

Answer 4

type 1 = a research study finds a statistically significant difference between groups when there isn’t actually one that exists

type 2= a research study that doesn’t find a statistically significant difference between groups when one exists

Question 5

define correlation and what is it based off

Answer 5

the condition or fact of being related, connected or associated

• direction
• strength

Question 6

what’s a correlation analyses

Answer 6

• Pearsons production moment
• strength and direction of relationship

Question 7

what is a linear regression

Answer 7

• multiple independent variables on a dependent variable
• prediction of the dependent variable from the independent

Question 8

define Pearsons correlation

Answer 8

quantifies relationship between two continuous variables

correlation coefficient:

• between 1 and -1
• direction of relationship
• strength