Question 29 (1 point)

A quality control department tested a new product and the result revealed 480 out of 1050 items were rated high quality. At 90% confidence level, the margin of error for the proportion of items rated high quality is ____________

Question 29 options:

a)	None of the options
b)	2.54%
c)	3.72%
d)	1.54%
e)	45.71%

Question 30 (1 point)

A survey of 1170 Canadians revealed that 1800 expressed their intentions to vote in the upcoming election. At 90% confidence, the margin of error for the proportion of Canadians who expressed their intention to vote is ___________

Question 30 options:

a)	None of the options
b)	1.12%
c)	2.22%
d)	1.86%
e)	6.35%

Question 31 (1 point)

Many people who bought X-Game gaming systems over the holidays have complained that the systems they purchased were defective. In a sample of 200 units sold, 18 units were defective. With 95% confidence level, establish the interval estimate of the percentage of defective systems in the population.

Question 31 options:

a)	0.0564 to 0.1667
b)	0.0890 to 0.0786
c)	0.3098 to 0.5667
d)	None of the options
e)	0.0503 to 0.1297

Question 32 (1 point)

Insurance Canada has expressed growing concern about the number of motor vehicles not covered by auto insurance. A sample of 200 vehicles revealed that 44 were not covered by insurance. At 90% confidence, the interval estimate for proportion of cars not insured is between ___________

Question 32 options:

a)	17.17% and 26.83%
b)	None of the options
c)	22.00% and 44.00%
d)	20.45% and 26.72%
e)	18.25% and 24.75%

Question 33 (1 point)

To calculate a planning value to determine a minimum sample size requires that the _____________

Question 33 options:

a)	margin of error is divided by 4
b)	range is divided by 4
c)	The level of confidence
d)	None of the options
e)	standard deviation is divided by 4

Question 34 (1 point)

What default value will be used to calculate the minimum sample size required for a research study if the population proportion of interest is unknown for a categorical data?

Question 34 options:

a)	0.25
b)	0.50
c)	0.75
d)	0.95
e)	0.05

Question 35 (1 point)

A researcher is interested in determining the average number of years of employee retention in a company. If past information shows a population standard deviation of 9 months, what sample size should be taken so that, at 95% confidence, the margin of error will be within 3 months?

Question 35 options:

a)	70
b)	30
c)	21
d)	None of the options
e)	35

please ans within an hour