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Worksheets03. Practice 5.6 Confidence Intervals
Total questions: 8
Worksheet time: 5mins
If the 95% Confidence Interval for a population mean is from 114.56 to 125.54, then is it likely that the the mean (µ) is greater than 130?
Yes
No
Not enough information
I have no idea what you're asking of me
Which of the following is another way of representing the range 60.8% to 67.2%?
64 ± 3.2%
60 ± 0.8%
64 ± 0.2 %
67 ± 0.2%
A poll showed that 58% of people living in Canada know that the cost of living for the average Inuit is 50% higher than the cost of living for other Canadians. The results of the survey are considered accurate within ± 3.1%, 19 times out of 20. Which of the following represents the confidence level:
58%
3.1%
50%
95%
A poll showed that 58% of people living in Canada know that the cost of living for the average Inuit is 50% higher than the cost of living for other Canadians. The results of the survey are considered accurate within ± 3.1%, 19 times out of 20. Which of the following represents the margin of error:
58%
3.1%
50%
95%
A poll showed that 58% of people living in Canada know that the cost of living for the average Inuit is 50% higher than the cost of living for other Canadians. The results of the survey are considered accurate within ± 3.1%, 19 times out of 20. Which of the following represents the confidence interval:
58% ± 3.1%
3.1% ± 58%
50% ± 58%
95% ± 19%
A poll showed that 64% of grade 11 Math students reported better dental checkups after using Winterfresh Toothpaste. The results of the survey are considered accurate within ± 3.4%, 9 times out of 10. What is the confidence level:
90%
3.4%
64%
95%
A poll showed that 64% of grade 11 Math students reported better dental checkups after using Winterfresh Toothpaste. The results of the survey are considered accurate within ± 3.4%, 9 times out of 10. What is the confidence interval:
90% to 100%
3.4% to 64%
60.8% to 67.2%
90% to 95%
A poll showed that 64% of grade 11 Math students reported better dental checkups after using Winterfresh Toothpaste. The results of the survey are considered accurate within ± 3.4%, 9 times out of 10. If 54 students used this toothpaste, what is the range of the mean number of classmates who could expect better dental checkups?
33 to 36 people
32 to 37 people
35 people
2 to 4 people
