Math 110- Statistcs Exam With Complete
Solutions (A+)
Find z/2 when = 0.07 - Answer 1.81
Find the percentage corresponding to z/2 = - Answer 1.62 for confidence level of 89.48%
From the confidence level, find the critical value z/2 using 91% of confidence - Answer
1.70
From the confidence level, find the critical value z/2 using 98% of confidence - Answer
2.33
Confidence interval given here is 0.491 ± 0.057 and it can be expressed as p - E < p < p +
E. - Answer 0.434 <p <0.548
Confidence interval given here is (0.432, 0.52) and it can be expressed as p ± E. -
Answer 0.476 ± 0.044
A confidence interval for a population proportion, p, is given below. 0.753 < p <
0.797. Using these confidence interval limits, find the point estimate, p. - Answer 0.775
The following confidence interval is derived for a population proportion, p: (0.399,
0.437). Using these confidence interval limits, find the margin of error, E. - Answer 0.019
90% confidence; n = 300, x = 140 - Answer 0.0474
Solutions (A+)
Find z/2 when = 0.07 - Answer 1.81
Find the percentage corresponding to z/2 = - Answer 1.62 for confidence level of 89.48%
From the confidence level, find the critical value z/2 using 91% of confidence - Answer
1.70
From the confidence level, find the critical value z/2 using 98% of confidence - Answer
2.33
Confidence interval given here is 0.491 ± 0.057 and it can be expressed as p - E < p < p +
E. - Answer 0.434 <p <0.548
Confidence interval given here is (0.432, 0.52) and it can be expressed as p ± E. -
Answer 0.476 ± 0.044
A confidence interval for a population proportion, p, is given below. 0.753 < p <
0.797. Using these confidence interval limits, find the point estimate, p. - Answer 0.775
The following confidence interval is derived for a population proportion, p: (0.399,
0.437). Using these confidence interval limits, find the margin of error, E. - Answer 0.019
90% confidence; n = 300, x = 140 - Answer 0.0474
