1 If a variable is normally distributed researchers will nee

1. If a variable is normally distributed, researchers will need more data to determine the same information using parametric methods than they would using nonparametric methods. In other words, parametric methods are not as efficient as nonparametric methods.

A. True

B.False

2. Which of the following is not an advantage of nonparametric methods over parametric methods?

a. They can be used to test population parameters when the variable is not normally distributed.

b. They can be used when the data are nominal or ordinal.

c. They can be used to test hypotheses that do not involve population parameters.

d. They can use smaller sample sizes to give the same amount of information as their parametric counterparts.

3. The _______________ is used to test a hypothesis about a median value for a sample. It includes counting the number of values greater or less than the hypothesized median value.

Solution

1) False, if assumptions are met, parametric methods are more efficient than non-parametric

2) (d) is wrong statement!!, (a,b,c) are advantages.

3) sign test is used....