Use the sample data and confidence level given below to complete parts (a) through (d)
A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1056 and x=599 who said "yes." Use a 90% confidence level.Use the sample data and confidence level given below to complete parts (a) through (d)
Solution:
Given:
n = 1056
x = 599
Confidence level = c = 90%
Part a) Find point estimate of population proportion:
Part b) Margin of error:
Zc is z critical value for c = 90% confidence level.
Find Area = ( 1 + c ) / 2 = ( 1 + 0.90) / 2 = 1.90 / 2 = 0.9500
Look in z table for Area = 0.9500 or its closest area and find corresponding z value.
Area 0.9500 is in between 0.9495 and 0.9505 and both the area are at same distance from 0.9500
Thus we look for both area and find both z values
Thus Area 0.9495 corresponds to 1.64 and 0.9505 corresponds to 1.65
Thus average of both z values is : ( 1.64+1.65) / 2 = 1.645
Thus Zc = 1.645
thus
Part c) Construct the confidence interval.
Part d) Interpretation:
One has 90% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.
Use the sample data and confidence level given below to complete parts (a) through (d) A...
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n = 936 and x = 548 who said "yes." Use a 90 % confidence level. b.) Identify the value of the margin of error E
Use the sample data and confidence level given below to complete parts (a) through (b). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 980 and x equals 568 who said "yes." Use a 90 % confidence level.
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 1056n=1056 and x equals 598x=598 who said "yes." Use a 90 % confidence level a) Find the best point estimate of the population proportion p b) Identify the value of the margin of error E c) Construct the confidence interval. d) Write a statement that correctly interprets...
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1025 and x=520 who said "yes." Use a 90% confidence level. a) Find the best point estimate of the population proportion p. =0.507 b) Identify the value of the margin of error E. E=
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 1050 and x equals 569 who said "yes." Use a 95 % confidence level a) Find the best point estimate of the population proportion p.
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 962 and x equals 558 who said "yes." Use a 95 % confidence level. a) Find the best point estimate of the population proportion p.
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals 937n=937 and x equals 597x=597 who said "yes." Use a 99 %99% confidence level. LOADING... Click the icon to view a table of z scores.
Use the sample data and confidence level given below to complete parts a through d. A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1040 and x=544 who said yes. Use a 95% confidecne level. A. find the best point of estimate of the population of portion p. B. Identify the value of the margin of error E. E= round to four decimal places as needed. C. Construct the confidence interval. _ <...
Use the sample data and confidence level given below to complete parts a through d. A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1069 and x=557 who said yes. Use a 99% confidecne level. A. find the best point of estimate of the population of portion p. B. Identify the value of the margin of error E. E= round to four decimal places as needed. C. Construct the confidence interval. _ <...
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1015 and x = 590 who said "yes." Use a 95% confidence level. B! Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. 0.581 (Round to three decimal places as needed.) b) Identify the value of the...