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this assignment is due in 20 mins anyone that is good at math?
Question 1
Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. 98% confidence; the sample size is 800, of which 40% are successes
A.0.0339
B.0.0446
C.0.0403
D.0.0355
1 points
Question 2
Find the value of that corresponds to a confidence level of 91%.
A.1.75
B.1.34
C.1.645
D.1.70
1 points
Question 3
Find the appropriate critical value for the following: 99% confidence level ; n = 17; σ is unknown; population appears to be normally distributed.
A.zα/2 = 2.567
B.zα/2 = 2.583
C.tα/2 = 2.898
D.tα/2 = 2.921
2 points
Question 4
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. n = 195, x = 162; 95% confidence
A.0.788 < p < 0.873
B.0.777 < p < 0.884
C.0.789 < p < 0.873
D.0.778 < p < 0.883
1 points
Question 5
Thirty randomly selected students took the calculus final. If the sample mean was 95 and the standard deviation was 6.6, construct a 99% confidence interval for the mean score of all students.
A.92.03 < μ < 97.97
B.92.95 < μ < 97.05
C.91.68 < μ < 98.32
D.91.69 < μ < 98.31
1 points
Question 6
50 people are selected randomly from a certain population and it is found that 12 people in the sample are over 6 feet tall. What is the point estimate of the proportion of people in the population who are over 6 feet tall?
A.0.18
B.0.76
C.0.24
D.0.50
2 points
Question 7
Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.028; confidence level: 99%; and unknown
A.2223
B.2115
C.1116
D.1939
