Margin of Error

The sample size of poll is 107 people. What is the approximate margin of error.

• 10%

• 3.1%

• 2.38%

• 1%

Tags

CCSS.HSS.IC.B.4

As a data scientist you have been asked to compare the difference of two percentages within the same survey. Which margin of error rule would you use?

• $\frac{1}{\sqrt{n}}$

• $2\times\frac{1}{\sqrt{n}}$

• $1.5\times average\ MoE$

• $\frac{2}{\sqrt{n}}$

• $\sqrt{n}$

Tags

CCSS.HSS.IC.B.4

To cut the margin of error in half, the sample size would have to increase by ______________.

• 100

• 2 times

• 3.1%

• 4 times

Tags

CCSS.HSS.IC.B.4

A survey of 400 people is done, what is the approximate margin of error.

• 5%

• 3.1%

• 20%

• 10%

Tags

CCSS.HSS.IC.B.4

For a class project, a student in a statistics class surveys the monthly rent for 32 unfurnished one-bedroom apartments in Boston and finds the mean monthly rent to be $1400 with a standard deviation of $220.

Find the margin of error for the sample mean. (assuming 95% confidence) Round to the nearest hundredth

• $77.78

• $4.31

• $188.78

• $494.97

For a class project, a student in a statistics class surveys the monthly rent for 32 unfurnished one-bedroom apartments in Boston and finds the mean monthly rent to be $1400 with a standard deviation of $220.

Find the margin of error for the sample mean. (assuming 95% confidence) Round to the nearest hundredth

• $76.23

• $4.31

• $188.78

• $494.97

A random sample of 40 bags of Doritos was obtained.

The mean weight was 15.5 oz with a standard deviation of 0.2 oz.

At a 95% confidence level, find the margin of error of the sample.