Statistics Chapter 9  Hypothesis Testing
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What is the process to test a hypothesis?
 Identify the problem
 Create a hypothesis
 Test hypothesis against data

What is the Confidence Level?

What is the Significance Level?

What is the representation for Null Hypothesis?

What is the representation for Alternative Hypothesis?

What is the main rule of a hypothesis?
Hypothesis must be falsibiable

A hypothesis should be mutually what...?
Mutually exclusive and mutually exhaustive

What is the goal with hypothesis testing?
Try to reject the null

What is the notation for the onesided "greater than" alternative/onetailed, "uppertail" test?

What is the notation for a onesided, "less than" alternative/onetailed, "lowertail" test?

What is the notation for a twotailed test?

is the chance of what?
Mistakenly rejecting a true null hypothesis

What is a Type I Error?
 Rejecting when it is true
 Too skeptical

What is a Type II Error?
 Accepting what it is false
 Being too gullible

= the probability of what?
P(Making a Type I Error)

= the probability of what?
P(Making a Type II Error)

?
1

What are the steps of the Critical Value approach?
 Set up NULL and Alternative hypotheses
 Choose a Significance Level
 Collect sample data and compute value of test statistic
 Determine critical value and rejection rule
 Reject or fail to reject the null

What does the
separate?
Reject and do not reject regions

What is a pvalue?
The probability of getting
or value more extreme

What are the steps of the pvalue approach?
 Set up NULL and Alternative hypotheses
 Choose a Significance Level
 Collect sample data and compute value of test statistic
 Use test statistic to compute pvalue
 Reject or fail to reject null

What is the rejection rule for a pvalue?
Reject
if pvalue