8.1 Intro to Confidence Intervals

What is a point estimate used for?

• To estimate an unknown population parameter

• To measure the weight of a sample

• To determine the speed of a vehicle

• To guess the color of a sample

Tags

CCSS.HSS.IC.B.4

What does a confidence interval provide?

• A single number that is always correct

• A list of all possible values

• A range of plausible values for a parameter

• An exact value of a parameter

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CCSS.HSS.IC.B.4

What happens to the confidence interval if the confidence level is increased?

• The interval becomes narrower

• The interval becomes wider

• The interval disappears

• The interval stays the same

How can you reduce the margin of error without changing the confidence level?

• Change the parameter

• Increase the sample size

• Ignore the data

• Decrease the sample size

Tags

CCSS.HSS.IC.B.4

What is the only way to fix bias in data?

• Ignore the bias

• Increase the sample size

• Use statistical techniques

• Throw out biased data and start over

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CCSS.HSS.IC.B.3