. Ir We reject a null nypothesis that is actually true, then we have committed a

Question

. Ir We reject a null nypothesis that is actually true, then we have committed a type I error. Part II. Multiple Choice Questions Circle the letter that corresponds to the correct answer 1. Which of these distributions is not a family of curves? (2 pts each) a. Standard Normal Distribution c. Chi-Square Distribution b. Student t Distribution d. None of these distributions is a family of curves. 2. Which of these distributions is not symmetric? a. Standard Normal Distribution c. Chi-Square Distribution b. Student t Distribution d. All of these distributions are symmetric. When a 90% confidence interval is calculated instead of a 95% confidence interval with the same sample data, the margin of error will be a. Smaller 3. b. Larger c. The same d. It cannot be determined. 4. The best point estimate of the population mean is the a. sample median. b. sample mode. c. sample midrange. d. sample mean.

Explanation / Answer

1. Correct option:

a. Standard Normal Distribution

EXPLANATION: Other 3 distributions have got various curves corresponding to Degress of freedom

2. Correct option:

c    Chi-Square Distribution

3. Correct option:

a. Smaller

4. Correct option:

d.   Sample mean

5. Correct option:

b. wider than

6. Correct option:

a. Standard Normal Distribution

7. Correct option:

c   two-tailed test

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