A researcher wants to estimate the proportion of the population which possess a given characteristic. A random sample of size 600 is taken resulting in 330 items which possess the characteristic. The point estimate for this population proportion is _______.
0.55
举一反三
- 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
- A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is
- If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, then
- The problem with relying on a point estimate of a population parameter is that:
- When a range of values is used to estimate a population parameter, it is called _______. A: a point estimate B: an interval estimate C: a statistical parameter D: a range estimate
内容
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Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations, taken at random from this population, exceeds 78 is:
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A summary measure that is computed from a sample to describe a characteristic of the population is called:
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When estimating population parameters, a point estimate is:? always equal to a population value.|a range of possible values for a population parameter.|the population mean.|a statistic that estimates a population parameter.
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A summary measure that is computed to describe a characteristic from only a sample of the population is called
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The proportion of the English in the whole population accounts for .