Hypothesis Testing
Hypothesis Testing
Hypothesis Testing
Hypothesis Testing
100
In a null hypothesis, the sign of the statement is always________.
=
100
When the P-Value is small enough, we say that________ to reject the null hypothesis.
we have evidence
100
The alternative hypothesis is ___________ if there is interest in deviations from the null hypothesis in only one direction.
One-sided
100
________ gives the probability of avoiding a type II error
power
200
The probability of obtaining a sample statistic as extreme as the one obtained if the null hypothesis is assumed to be true is the ______.
P-Value
200
The null hypothesis is detonated with
Ho
200

Hypotheses are always about the _________, never about the sample.

population

200

Always give ________ in your conclusion

Context

300
Rejecting a true null hypothesis is called _________ error.
Type I
300
An alternative hypothesis is detonated as_____
Ha
300
A larger sample size results in a ______ power.
larger
300

Suppose Ho: p=0.4 and the power of the test for the alternative hypothesis p=.35 is .75. Which of the following is a valid conclusion. A.) The Probability of committing a type I error is .005 B.) The probability of committing a type II error is .65 C.) If the alternative p=.35 is true, the probability of failing to reject Ho is .25

C

400
The probability of mistakenly failing to reject a false null hypothesis is _________ error.
Type II
400

In a hypothesis test, we fail to reject a null hypothesis if _______ is true.

p-value is greater or equal to alpha

400
What is the probability of mistakenly failing to reject a null hypothesis when a hypothesis test is being conducted at the 5% significance level (a=0.05)?
There is insufficient information to answer this question
400
Choosing a smaller level of significance, that is a smaller a-risk, results in a ______ risk of type II error
A higher risk of type II error
500

The power of a hypothesis test is the probability that a _________ error is not committed.

Type II

500

Hypothesis tests are designed to measure the _________ of evidence against the null hypothesis.

Strength

500

You plan to preform a hypothesis test with the level of significance at .05. What is the effect on the probability of committing a type one error if the sample size is increased?

The probability is unchanged

500
A school superintendent must make a decision whether or not to cancel school because of a threatening snow storm. What would the results be of Type I and Type II errors for the null hypothesis: The weather remains dry
Type I: Weather remains dry, school is needlessly canceled Type II: School isn't canceled and the storm hits
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