举一反三
- A summary measure that is computed from a sample to describe a characteristic of the population is called:
- A summary measure that is computed to describe a characteristic from only a sample of the population is called A: a statistic. B: a parameter. C: a census. D: the scientific method.
- The test statistic measures how close the computed sample statistic has come to the hypothesized population parameter.
- The difference between the sample mean and the population mean is called the sampling error.
- The difference between the sample size and the population size is called the sampling error.
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An analyst does research about sampling and estimation. With respect to statistical analysis, a sample statistics is least described as: A: the set of rules used to select a sample. B: quantity computed from a sample. C: descriptive measure of a sample.
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A portion of the population selected to represent the population is called A: statistical inference B: descriptive statistics C: a census D: a sample
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The difference between the sample mean and the population mean is called the: A: population deviation. B: population standard deviation. C: standard error of the mean. D: sampling error.
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A researcher wants to estimate the difference in the means of two populations. A random sample of 36 items from the first population results in a sample mean of 430. A random sample of 49 items from t
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When testing for a difference in two population means from small samples, a pooled variance must be computed when ___________.