Exam 7: Probability and Hypothesis Testing

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Imagine that I have a jar that contains20 black poker chips and 40 red poker chips.What is the probability of selecting a red poker chip or a black poker chip?

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Inferential statistics allow us to

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_____ statistics are used in the process of hypothesis testing.

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What is the probability of a couple having two children in the following order: girl,boy?

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A liberal statistical test is one that

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Rejecting H0 when we should have failed to reject it is a _____ error.

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What are inferential statistics and how do they differ from descriptive statistics?

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What it the probability of two heads in two flips of a coin?

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Given that on one section of the SAT the mean is 500 and the standard deviation is 100,what is the approximate probability of a student scoring 400 or lower or 700 or higher on the test?

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Imagine that you have a bag filled with 10 pink marbles and 5 black marbles.What is the probability of pulling a black marble from the bag?

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If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds what is the probability of selecting someone who weighs 170 or more pounds?

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Explain how a one-tailed hypothesis differs from a two-tailed hypothesis.

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In a study on the effects of amount of sleep on driving performance,researchers predict that those in the group that is allowed more sleep will exhibit better driving performance.The researchers are using a _____ hypothesis.

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What is the probability of pulling a jack from a standard (52-card)deck of playing cards?

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Identify when it would be appropriate to use a parametric versus a nonparametric test.

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_____ are most often used with interval or ratio data whereas _____ are most often used with ordinal or nominal data.

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Directional hypothesis is to non-directional hypothesis as _____ hypothesis is to _____ hypothesis.

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Given that on one section of the SAT the mean is 500 and the standard deviation is 100,what is the approximate probability of a student scoring 600 or higher on the test?

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What is the probability of a couple having three children in the following order: girl,girl,girl?

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A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner.Identify H0 and Ha.Is this a one- or two-tailed test?

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