You are a developmental psychologist and are interested in how math anxiety changes with age. You go into an elementary school and measure the math anxiety of 15 children who are in the 2^nd grade. Assume that this is an interval variable and that higher scores indicate higher levels of math anxiety.

These are their scores:

0, 5, 3, 6, 2, 3, 4, 1, 2, 3, 1, 5, 2, 4, 3 (M =2.93, s=1.67)

You know that nationally 2^nd grade students have a math anxiety level of = 3.00 with a standard deviation =1.75.

You want to test to see if your sample is the same or different from the national population in math anxiety.

Question 47 (3 points)

You should use ___________tailed hypotheses.

Question 47 options:

	None the above
	Two-tailed
	One-tailed
	Three tailed

Question 48 (3 points)

The correct null hypothesis for this study is

Question 48 options:

	H0: sample 2.93
	H0: sample = 3.00
	H0: sample = 2.93
	H0: sample 3.00

Question 49 (3 points)

The correct alternative hypothesis for this study is

Question 49 options:

	HA: sample = 2.93
	HA: sample = 3.00
	HA: sample 2.93
	HA: sample 3.00

Question 50 (3 points)

The standard error of the mean is

Question 50 options:

	1.750
	15
	.117
	.452

Question 51 (3 points)

The z_obt for this study is:

Question 51 options:

	-.04
	+.15
	-.15
	-.07

Question 52 (3 points)

The critical value for this study is

Question 52 options:

A)

1.96

B)

-1.96

C)

1.645

D)	both A and B

Question 53 (3 points)

Based on the results of you study what can you conclude?

Question 53 options:

	Students in this group have better math teachers than the general population
	Students in this group have the same average level of math anxiety as the general population
	Students in this group have a higher level of math anxiety than the national population
	Students in this group have a lower level of math anxiety than the national population

Question 54 (3 points)

Based on your conclusion, it is possible that you have made a

Question 54 options:

	False alarm
	error
	Type I error
	Type II error