Class 14-Chapter 9:Hypothesis Tests-9.1-9.3

What is the p-value approach?

A probability for the evidence against the Null, H sub zero, as provided by a sample.

True/False: Smaller p-values are less evidence to reject the Null.

False; smaller values indicate more evidence to reject the Null, H subzero.

True/False: Hypothesis testing is used to determine whether a statement about a sample parameter should or should not be rejected.

False; testing deals with a population parameter.

What is the Second step for testing a hypothesis?

Specify the desired level of significance.

What is denoted by mew sub zero?

The hypothesized mean; mew is the population mean.

What is the null hypothesis?

A tentative assumption about a population parameter.

What is a good way to remember the typical Null Hypothesis?

A typical Null statement is skeptical. Another way to put it, the null hypothesis is an assumption to be challenged.

What is the Third step for testing a hypothesis?

Collect data and compute the test statistic.

What is the First step for testing a hypothesis?

Develop the Null hypothesis, H knot, and the alternative hypothesis, H sub A.

What is the Fourth step for testing a hypothesis?

Evaluate the hypothesis (p-value or critical value).

What is the rejection rule using P value?

Reject H knot if the value is less than or equal to alpha.

What is a Type 2 error?

The Null is false, but it was accepted. "I falsely think the hypothesis is false".

What is a Type 1 error?

The Null is true, but it was rejected. "I falsely think the hypothesis is true".

Which notation is p-value associated with?

The alpha level.

What is the alternative hypothesis, denoted by H sub A?

The complement of the Null Hypothesis.

What are the two indications for the competing statements in hypothesis testing?

The null Hypothesis, denoted by H sub 0 and the alternative Hypothesis, denoted by H sub A.

What is the level of significance?

The probability of making a type 1 error when the null is true as an equality.

True/False: Hypothesis tests use data from a sample to evaluate two competing statements?

True.

True/False: The alternative hypothesis is associated with research...?

True.

What is the critical value approach?

Using the z value that provides an area of alpha in the tail of the standard normal distribution.

What is the Test Statistic for hypothesis tests about a Population Mean? (Standard Deviation known).

Z equals x bar minus the mew sub zero, hypothesized population mean, divided by the sigma standard deviation over the square root of n.