Exam 7: Statistics and Parameters

The problem with the Gallup poll of 1948 (when Dewey was predicted to beat Truman) was that

The Central Limit Theorem states that the sampling distribution of means is

With a known population mean of 10 and a known standard error of the mean of 1.47, what is the probability of selecting at random a sample whose mean is 8.50 or less?

The z test assumes that the sampling distribution of means is normal.

The z test draws a comparison between the sample means and the known population mean.

One measure of the overall sampling error in the entire distribution of sample means is the

When a group is selected from a population on the basis of sharing the same percentages of trait characteristics as are known to exist in the population, then the group so selected would constitute

Populations are to parameters as samples are to

When graphing the sampling distribution of means, the various sample means are represented on

When sampling error is constant and in one direction, the sampling must be biased.

The standard deviation of the population of individual scores is 22.50. A given random sample of 100 scores produces a mean of 210. Calculate the standard error of the mean.

When all possible samples have been randomly selected from a single population, the standard deviation of the resulting distribution of means is called

A statistic always refers to a sample measure.

Omega University has a total student enrollment of 6000, and all 6000 students were tested for IQ. The mean IQ for the group was 115. This value of 115 constitutes a

The standard deviation of the population of individual adult male weight scores is 25 pounds. A random sample of adult males produces a mean of 180 pounds. a. Calculate the standard error of the mean. b. Test the hypothesis, via the z test, that this sample could still be representative of a population whose mean is known to be 170 pounds.

If the names of all the students at Omega University were placed in a fishbowl, and the researcher selected out 10% of the names, the resulting sample would be

The size of a given population may be

If Omega University had a total student enrollment of 600, and 5999 of these students were selected for testing, the group being test would constitute

The Central Limit theorem only applies when the distribution of individual sample scores is normal.

The standard deviation of the population of adult female spine lengths is .92 inches. A random sample of 40 women was selected and the mean spine length was found to be 26 inches. a. Calculate the standard error of the mean. b. Use the z test to determine whether this sample could be representative of a the general population of women whose mean spine length is known to be 24 inches.