Exam 11: Population Estimates and Hypothesis Testing

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In ____________ hypothesis testing, someone uses something observed to see if it agrees with or goes against the belief about that topic.

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A 99 percent confidence interval allows us to say that if we took many, many samples from the population:

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If you were investigating the percentage of high school students who eat at the local Subway, the percentage, because it is derived from the sample, is the sample finding.

(True/False)
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Directional hypotheses contain statements of "greater than" or "less than."

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An important sample value used in making estimates about population parameters is sample size.

(True/False)
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If many, many samples were taken and the sample findings for all of these samples were plotted as a frequency distribution, it would approximate a bell-shaped curve called the:

(Multiple Choice)
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In order to estimate a population percentage, all that is needed is the:

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The standard error is a measure of the variability in the sampling distribution based on what is believed would occur if a multitude of independent samples were taken from the same population.

(True/False)
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Suppose we wish to test the hypothesis that an internship program allows its interns to earn $2,750 per semester and let us assume that this hypothesis is, in fact, true. Which of the following best illustrates the logic of hypothesis testing at the 95% confidence level?

(Multiple Choice)
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Values that are computed from a complete census, using all members of the population, and are considered precise, valid, true measures of the population are called:

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When a statement about the population parameter is made based on prior knowledge, assumptions, or intuition, this is a hypothesis.

(True/False)
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Which of the following refers to a measure of the variability in a population based on the variability found in the sample?

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A toy store owner hypothesizes that parents spend less than $100 on toys per visit to her store. This is a(n):

(Multiple Choice)
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Regardless of whether a percentage hypothesis or an average hypothesis is being used, the interpretation of a hypothesis test is:

(Multiple Choice)
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Ping Golf, Inc. conducts a study in which they use a probability sample of 600 golfers. They examine the data from the sample and calculate that 28 percent of them own Ping golf clubs. The 28 percent is:

(Multiple Choice)
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The standard error will increase if sample size is increased.

(True/False)
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The z value is agreed by statisticians to be more proper than the t value when the sample is large.

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Hypothesis testing is a statistical procedure used to accept or reject the hypothesis, based on sample information.

(True/False)
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___________ is the process of using sample information to compute an interval that describes the range of a parameter such as a population mean or the population percentage.

(Multiple Choice)
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To estimate a population parameter, you need to know the sample finding, which is a percentage derived from sample data of a metric question.

(True/False)
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