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Vocabulary
Probability
Sampling Distribution
Hypothesis Testing
100
Any process with uncertain results that can be repeated.
What is an experiment?
100
A basketball player shoots five free throws during the game, so S = {0,1,2,3,4,5}.
What is the sample space?
100

We have a random variable that is normally distributed with mean μ = 12 and standard deviation σ = 4. Find P(x̅  ≤ 10) with n = 5.

What is 0.1318? (normalcdf(-1E00,10,12, 4/sqrt5))
100
A researcher conducts a hypothesis test to evaluate the effect of an Etiquette Class on politeness. The hypothesis test produces the following results: z (65) = 2.60, p<05. Assuming that the researcher is using a two-tailed test, this is the correct conclusion.
What is reject the null, the etiquette class does have an effect on politeness?
200
The collection of all possible outcomes of a probability experiment.
What is a sample space?
200

This is the probability of obtaining a z-score less than or equal to 1 P(z ≤ 1).

What is .8413?
200
Suppose the population is not normally distributed. You should have a sample size of ___________ to ensure an approximately normal distribution.
What is 30?
200
This occurs when you conclude that a treatment has an effect when in reality it did not.
What is type I error (or alpha)?
300
A collection of outcomes from a probability experiment.
What is an event?
300
Mustafa reaches into a jar filled with 87 green, 92 yellow, and 76 red jelly beans. Mustafa randomly pulls out two red jelly beans. What is the probability that he will randomly select a third red jelly bean?
What is 74/253 (0.2925)?
300
You discover that the mean of a sample you're looking at has probability of less than 0.05. This suggests that the mean is ________________.
What is unusual?
300
You conduct a two-tailed hypothesis test, with alpha = .01. This is the proportion of scores that would fall in the rejection region on the right-hand side of the distribution.
What is 0.005?
400
The occurrence of event E in a probability experiment does not affect the probability of event F in the same experiment.
What are independent events?
400

Maria reaches into a jar filled with 87 green, 92 yellow, and 76 red jelly beans. Maria randomly pulls out two red jelly beans and one yellow jelly bean. What is the probability that she will randomly select a green jelly bean?

What is 87/252 (0.3452)?
400
The larger the sample size, the _______ the sampling error.
What is smaller?
400
Sometimes a Z-test will not be statistically significant simply because there is a small sample size. In this case, we might instead use a test of _________________ to examine how strong the effect really is.
What is Effect Size (or Cohen’s D)?
500

The shape of the sampling distribution gets closer to normal as the sample size increases.

What is the Center Limit Theorem?
500

According to the US Census Bureau, about 33% of Americans have a bachelor’s degree or higher. What is the probability that at least one of five randomly selected Americans does not have a bachelor's or higher degree?

What is 0.9959?
500
A sample of pug puppies is obtained to determine their cuteness on a scale from 1-20 points. They come from the general population of all puppies, which has mean of 12 points and has a standard error of 2 points. How many puppies are in the sample?
What is N=36?
500
A sample of 25 lifeguards from Fort Lauderdale are asked to report how many times they have seen dolphins swimming in the ocean this summer, and their mean response = 8. Researchers first compare this sample to the population of lifeguards in the US which have a mean = 10, SD = 4. Researchers also compare this sample to the population of life guards in the Dominican Republic which have a mean of 10, SD = 1. There is a greater chance of finding a significant difference in this scenario.
What is comparing Ft. Lauderdale to the Dominican Republic?