Chapter 6
Mathematic characteristics of the sample.
What are statistics?
The z score associated with a confidence level of 95%.
What is ±1.96?
Differences that did not occur by random chance.
What are significant differences?
Samples must be mutually exclusive and independent of one another.
What is independent random sampling?
The sampling distribution for the ANOVA test.
What is the F distribution?
When we can learn about large groups (populations) by looking at smaller groups (samples).
What is a inferential statistics?
The alpha level associated with a confidence level of 95%.
What is .05?
There is no difference.
What is the null hypothesis?
The denominator of the z formulas when testing for differences between two populations by way of two samples.
What is the pooled estimate?
ANOVA is appropriate for situations in which we are comparing ______.
What is three or more samples?
Dividing the population into traits to select your sample.
What is stratified sampling?
The percent that we are wrong and our interval does not contain the population mean/proportion.
What is alpha level?
The difference is real.
What is the alternative/research hypothesis?
When conducting a hypothesis test in one direction.
What is a one-tailed test?
Use this to find your critical F-score.
What is Appendix D?
The mean of this theoretical distribution is equal to the mean of the (unknown) population.
What is the sampling distribution?
Unless told otherwise, Pu always equals ______.
What is .50?
If the obtained z score falls in the critical region, we will ______ the null hypothesis.
What is reject?
If the obtained z score does NOT fall in the critical region, we will ______ the null hypothesis.
What is accept (or fail to reject)?
To calculate the mean square estimates, we must divide our sum of squares by _______.
What are degrees of freedom?
Our sample should be ________ of the population of interest in order to make inferences/generalizations.
What is representative?
This is also sometimes called a "margin of error."
What is a confidence interval?
We use this distribution when our sample size (N) is less than 100.
What is the [student's] t distribution?
The research and null hypotheses _____ each other
What is contradict?
These are used to compute the F ratio.
What are mean square estimates?