Use ParSCORE for Section 1 and 2, write down your answer BELOW each question DIR

Question

Use ParSCORE for Section 1 and 2, write down your answer BELOW each question DIRECTLY in Section 3. Section 1 : True or False (2x11 = 22 points): A for True, B for False. Answer the questions in your ParScore Form (From 1 to 11) 1, is parameter. 2, r is parameter. 3. Let x = the number of success among n trials, then x is regarded as the geometric random variable. 4. A good estimator should be unbiased and small standard error All else being equal, the width of the confidence interval for p decreases as the sample size increases. With the same sample size, if the population proportion is 0.5, then the standard error 5. 6. of p has the largest value. 7. All else being equal, width of 95% confidence interval is larger than width of 90% confidence interval. 8. In general, a wider confidence interval is associated with greater precision 9. The t-curve is also bell shaped like z curve 10. As degree of freedom in t-distribution goes to positive infinity, the t-curve is approximating the standard normal curve. 1. All else being equal, the larger the sample size, the narrower the confidence interval.

Explanation / Answer

1) False

2) False

3) False

4) True

5)True

6) False

7) True

8)True

9)True

10) True

11) True

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