Question

The standard deviation of the sample proportion (sometimes called pbar) is referred to as the

                a.             standard proportion

                b.             sample proportion

                c.             average proportion

                d.             standard error of the proportion

The standard deviation of the sample mean (sometimes called xbar) is referred to as the

                a.             standard x

                b.             standard error of the mean

                c.             sample standard mean

                d.             sample mean deviation

The standard deviation of a point estimator is the

                a.             standard error

                b.             sample statistic

                c.             point estimate

                d.             sampling error

A subset of a population selected to represent the population is a

                a.             subset

                b.             sample

                c.             small population

                d.             None of the alternative answers is correct.

The purpose of statistical inference is to provide information about the

                a.             sample based upon information contained in the population

                b.             population based upon information contained in the sample

                c.             population based upon information contained in the population

                d.             mean of the sample based upon the mean of the population

A numerical measure from a sample, such as a sample mean, is known as

                a.             a statistic

                b.             a parameter

                c.             the mean deviation

                d.             the central limit theorem

A probability distribution for all possible values of a sample statistic is known as a

                a.             sample statistic

                b.             parameter

                c.             simple random sample

                d.             sampling distribution

A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120. The sample mean was determined to be 320. The standard error of the mean is

                a.             1.875

                b.             40

                c.             5

                d.             15

As the sample size increases, the

                a.             standard deviation of the population decreases

                b.             population mean increases

                c.             standard error of the mean decreases

                d.             standard error of the mean increases

Answer 1

The standard deviation of the sample proportion is referred as the standard error of the sample proportion. It is obtained using the formula , where P is the population proportion.

So the answer is d.standard error of proportion

The standard deviation of the sample mean is referred as the standard error of the sample mean. It is obtained using the formula

So, the answer is b. standard error of mean

The standard deviation of the point estimator is called the standard error. The standard deviation of the sample mean is called the standard error of mean and the standard deviation of the sample proportion is the standard error of the proportion.

So, the answer is a. standard error.

A subset of the population selected to represent the population is called sample. A sample is a representative of the population and it has got all the proporties of the population.

So, the answer is b. sample