The standard error of a sample mean estimate decreases as: a. As the sample size on which the mean is based increases. b. As the number of samples increases. c. As the sample size on which the mean is based decreases. d. As the sample standard deviation increases.
1. The standard error of a sample mean estimate decreases as:
a. As the
b. As the number of samples increases.
c. As the sample size on which the mean is based decreases.
d. As the sample standard deviation increases.
2. Which of the following is not a property of a theoretical sampling distribution?
a. As the size of the samples the statistics in the sampling distribution are based on increases, the center of the sampling distribution gets closer to the true values of the quantity being estimated.
b. As the size that each statistic in the sampling distribution comes from increases, the variation in the values in the sampling distribution decreases.
c. The characteristics of the sampling distribution are known, and its variability can be estimated without having to repeat a study over and over again.
d. The shape of the sampling distribution is approximately normal, regardless of the shape of the individual observations being summarized by each statistic in the sampling distribution.
3. The variability in a collection of sample statistics from larger sized samples will tend to be _________ than/as variability from smaller sizes samples from the same population.
a. There is no way to predict how the variability of these two collections of sample statistics will compare.
b. Smaller
c. Larger
d. Exactly the same
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