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Z-Scores
Probability
Sampling Distribution
Hypothesis Testing
100
This type of score describes how many standard deviations away from the mean a particular raw score is.
What is a z-score?
100
The column in the Unit Normal Table which would help you find the proportion of scores in the lowest 10% of the graph.
What is Column C or the Column toward the tail
100
The sampling distribution is a distribution of all the possible ______ for a certain size sample.
What is means?
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
For a population with µ = 40 and σ = 8, the z score corresponding to X = 46.
What is z = 0.75?
200
This is the probability of obtaining a z-score greater than or equal to 0 p(z >/= 0).
What is .5000?
200
According to the Central Limit Theorem, the shape of the sampling distribution becomes more normal as the _____ increases.
What is the sample size (or N)?
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
For a population where σ = 10 and a score of X=60 corresponds to z= -0.50, this is the population mean.
What is 65?
300
A jar contains 7 red Twizzlers and 29 black Twizzlers. Sandra draws one black Twizzler from the jar and eats it. When she reaches in to grab another, the probability of her randomly selecting a black Twizzler this time:
What is 28/35?
300
The value of the standard error of the mean indicates how far away a sample mean is from the ____________.
What is the population mean?
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
Name two of the reasons that z-scores are useful.
What is to standardize distributions, identify exactly where scores are located within a distribution, and to compare raw scores measuring the same constructs
400
For a normal distribution with µ = 50 and σ = 10, this is the probability of randomly selecting a score greater than X = 56.
What is 0.2743?
400
The larger the sample size, the _______ the sampling error.
What is smaller?
400

This occurs when you conclude that a treatment did not have an effect when in reality it did.

What is a type II error (or beta)?

500
Last week, Luigi had exams in Math and in Art History. On the Math exam, the mean was µ = 30 with σ = 5, and Luigi had a score of X = 45. On the Art History exam, the mean was µ = 60 with σ = 8 and Luigi had a score of X = 68. The class which Luigi did better in.
What is Math?
500
For a normal distribution with µ = 100 and σ = 5, this is the probability of randomly selecting a score greater than X = 90 and X = 110. In symbols, p(110< X < 90?)
What is 0.9544?
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?