For 98% confidence interval for a population parameter,
-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.
-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.
-To compute a confidence interval for the mean, population standard deviation unknown, n=25, and α=0.10, enter the critical value with 3 decimal places
-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
–
-As the confidence level decreases, the confidence interval width
-a) Increases
-b) Decreases
– 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
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