1. For 98% confidence interval for a population parameter, e.g., the population mean, of all possible confidence intervals, how many will contain the true parameter value? Enter answer with 2 decimal places.
2. A sample of size 39 is selected from a normally distrusted population.The sample standard deviation is 4.400.What is the standard error of the distribution of sample means? Enter your answer with 3 decimal places.
3. To compute a confidence interval for the mean, population standard deviation unknown, n=25, and =0.10, enter the critical value with 3 decimal places
4. To compute a confidence interval for the mean, population standard deviation unknown, n=35, and a = 0.01, enter the critical value with 3 decimal places
6. As the confidence level decreases, the confidence interval width
7. a) Increases
8. b) Decreases
9. c) stays the same

6. As the sample size increases, confidence interval width

a) Stays the same

b) Increases

c) Decreases

6. A sample of 10 widgets has a mean of 38.000 and standard deviation of 5.050. At 90% confidence, the lower confidence limit with 3 decimal places