Asked by baptiste 6 years ago

The null hypothesis ____.

A) states that the treatment has no effect

B) is denoted by the symbol H1

C) is always stated in terms of sample statistics

D) All of the other choices are correct.

2.

The numerator of the z-score test statistic measures ____.

A) the average distance between M and m that would be expected if H0 was true

B) the actual distance between M and m

C) the position of the sample mean relative to the critical region

D) whether or not there is a significant difference between M and m

3.

The critical region for a hypothesis test consists of ____.

A) outcomes that have a very low probability if the null hypothesis is true

B) outcomes that have a high probability if the null hypothesis is true

C) outcomes that have a very low probability whether or not the null hypothesis is true

D) outcomes that have a high probability whether or not the null hypothesis is true

4.

If the sample data produce a test statistic (z-score) that is in the critical region, then which of the following is the appropriate conclusion for the test?

A) reject H0

B) reject H1

C) fail to reject H0

D) fail to reject H1

5.

A Type I error means that a researcher has ____.

A) concluded that a treatment has an effect when it really does

B) concluded that a treatment has no effect when it really has no effect

C) concluded that a treatment has no effect when it really does

D) concluded that a treatment has an effect when it really has no effect

6.

Which of the following is a fundamental difference between the t statistic and a z-score?

A) The t statistic uses the sample mean in place of the population mean.

B) The t statistic uses the sample variance in place of the population variance.

C) The t statistic computes the standard error by dividing the standard deviation by n ? 1 instead of dividing by n.

D) All of the above are differences between t and z.

7.

A sample of n = 4 scores has SS = 48. What is the variance for this sample?

A) 12

B) 16

C) 4

D) 2

8.

What is the sample variance and the estimated standard error for a sample of n = 4 scores with SS = 300?

A) s2 = 10 and sM = 5

B) s2 = 100 and sM = 20

C) s2 = 10 and sM = 20

D) s2 = 100 and sM = 5

9.

If a researcher reports a t statistic with df = 20, how many individuals were in the sample?

A) n = 19

B) n = 20

C) n = 21

D) cannot be determined from the information given

10.

The null hypothesis for the independent-measures t test states ____.

A) m1 - m2 = 0

B) M1 - M2 = 0

C) m1 - m2 ¹ 0

D) M1 - M2 ¹ 0

11.

When the null hypothesis is true, the t statistic will have an average value of ____.

A) 0

B) 1

C) 1.96

D) cannot be determined without additional information

12.

For the independent-measures t statistic, increasing sample variance will ____ the likelihood of obtaining a significant t statistic and ____ measures of effect size.

A) increase, increase

B) increase, decrease

C) decrease, increase

D) decrease, decrease

HLT 362

baptiste

Answered by moduloP 6 years ago

**Excerpt from file: **Math Tutorial The null hypothesis ____. A) states that the treatment has no effect B) is denoted by the symbol H1 C) is always stated in terms of sample statistics D) All of the other choices are correct. Correct Answer(s): A 2. The numerator of the z-score test statistic measures ____. A) the

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