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.