Question

QUESTION 2

When selecting a random sample, each score in the population

	a.	must be sampled without replacement
	b.	must have the same probability of being selected
	c.	must be selected one time
	d.	must have a random mean QUESTION 6 The standard error of th mean (SEMp) for sample means provides a measure of sampling error. a. True b. False

QUESTION 10

A population has a mean,  μ = 120 and a standard deviation, σ = 18. What is the z score for a sample mean of 122, from a sample of 81 people?

	a.	+0.11
	b.	+0.22
	c.	+1.00
	d.	9.09

QUESTION 17

Identify the best description of the effect size for this study.

	a.	small
	b.	small to medium
	c.	medium
	d.	medium to large
	e.	large

Answer 1

2. When selecting a random sample, each score in the population

- b. must have the same probability of being selected

6. The standard error of th mean (SEM_p) for sample means provides a measure of sampling error.

- a. True

10.A population has a mean,  μ = 120 and a standard deviation, σ = 18. What is the z score for a sample mean of 122, from a sample of 81 people?

- c. +1.00

As, z = (x-u)/(σ/sqrt(n))

z = (122-120)/(18/sqrt(81))

z = +1.00

17. Identify the best description of the effect size for this study.

- e. large