R_S Quiz #5
Hypothesis Testing
KNOW SYMBOLS FOR QUIZ (ON BACK)
Null Hypothesis
hypothesis that is tested
Alternative Hypothesis
hypothesis that expresses the resesrachers beliefs
Significance Level
(alpha): probability of type 1 error (1cc)
Significance Testing

examines how likely differences between groups and relationships between variables
occur by chance
CC (confidence coeffiecient)
usually 95% in social science
Calculated Value
a value that cuts off alpha in the tail (s) of a theoretical reference distribution
Critical Value
alpha: used in hypothesis testing: alpha level is the maximum probability where
you reject the null hypothesis if the null hypothesis is true: ex CC=90% so alpha=.10
Nondirectional Hypothesis
does not specify a particular direction of values for the parameters
Directional Hypothesis
specifies a particular direction of values for the parameters
OneTail Test

use of only one tail of the sampling distribution
TwoTail Test
use of two tails of the sampling distribution
Decision Making Rules

Reject
Retain
Central Limit Theorem
FORMULA:
2 Assumptions needed to run the formula(Short Answer)
1)
Population is a normal distribution
2)
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 Fall '19
 Statistics, Statistical hypothesis testing, 5%, 90%