BIOSTATS EXAM 2 GENERAL THOUGHT

A Type II error involves ___ a null hypothesis when it is ___.

A Type II error involves failing to reject a null hypothesis when it is false.

In the matched samples design (the design based on the mean difference), the sampling distribution at issue is the sampling distribution of ___.

In the matched samples design (the design based on the mean difference), the sampling distribution at issue is the sampling distribution of mean differences.

A ___ tailed test scenario is appropriate when the alternative or research hypothesis is non-directional in nature.

A two tailed test scenario is appropriate when the alternative or research hypothesis is non-directional in nature.

A(n) ____ hypothesis is a hypothesis that stands in opposition to the null hypothesis.

A(n ) alternative hypothesis is a hypothesis that stands in opposition to the null hypothesis.

An alternative or research hypothesis that specifies the nature or direction of a hypothesized difference is considered a ___.

An alternative or research hypothesis that specifies the nature or direction of a hypothesized difference is considered a directional hypothesis.

Failing to reject a null hypothesis when it is false represents a(n) _____ error.

Failing to reject a null hypothesis when it is false represents a(n) type 11 error.

In the test for the difference of means, independent sample design, the number of cases in each sample must be equal. True or false?

False

In the test for the difference of means, independent sample design, the number of cases in each sample must be equal. True or False?

False

If your calculated test statistic does not meet or exceed the critical value, you would ___ the null hypothesis.

If your calculated test statistic does not meet or exceed the critical value, you would fail to reject the null hypothesis.

Rejecting a null hypothesis when it is true represents a(n) ____ error.

Rejecting a null hypothesis when it is true represents a(n) type 1 error.

The alpha level is also known as the level of ___.

The alpha level is also known as the level of significance.

In a matched samples design (the test involving the mean difference) the number of cases in each sample must be equal. True or false?

True

The level of significance is the probability of making a(n) ___ error.

The level of significance is the probability of making a(n) type 1 error.

The levels of significance most commonly used by statisticians are the ___ and ___ levels.

The levels of significance most commonly used by statisticians are the .05 and .01 levels.

The ____ is represented by the symbol H0.

The null hypothesis is represented by the symbol H0.

When our calculated test statistic falls within the ____, we reject the ____.

When our calculated test statistic falls within the region of rejection, we reject the null hypothesis.

A Type I error involves ___ a null hypothesis when it is ___.

A Type I error involves rejecting a null hypothesis when it is true.

A ____ tailed test scenario is appropriate when the alternative or research hypothesis is directional in nature.

A one tailed test scenario is appropriate when the alternative or research hypothesis is directional in nature.

Another name for the region of rejection is the ____.

Another name for the region of rejection is the critical region.

In the independent samples design (the design based on the difference of means), the sampling distribution at issue is the sampling distribution of ___.

In the independent samples design (the design based on the difference of means), the sampling distribution at issue is the sampling distribution of the difference between means.