2) For sample proportion 0.750 and sample size 45,

2) For sample proportion 0.750 and sample size 45, what is the standard
error of the distribution of sample proportions? Enter your answer with 3 decimal places.
.
3) To compute a confidence interval for the mean, population standard deviation unknown, n= 30, and a = 0.05, 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

5) As the sample size increases, the margin of error
a) Increases
b) Decreases
c) Stays the same

6) As the confidence level increases ,the margin of error
a) Increases
b) Decreases
c) Stays the same

7) A sample of 10 widgets has a mean of 21.050 and standard deviation of 9.650. At 90% confidence, the lower limit with 3 decimal places is

8) A sample of 18 widgets has a mean of 37.550 and standard deviation of 8.700. At 99% confidence, the upper limit with 3 decimal places is

9) A statistics course has 21 students in whicj 74% passed. At 95% confidence, the upper confidence limit for the proportion students passing with 3 decimal palces is

10) A statitics course has 20 students in which 85.0% passed. At 90% confidence, the lower confidence limit for the proposition students passing with 3 decimal places is

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