Confidence Intervals Review

Front

What can you do to reduce the margin of error?

Back

Increase the sample size.

Front

Increasing the sample size __________ the confidence interval.

Back

Decreases.

Front

Given the interval (1.2, 1.8), what is the point estimate?

Back

1.5.

Front

Given the interval (1.2, 1.8), what is the margin of error?

Back

0.3.

Front

What critical value t* is used in constructing a 99% confidence interval based on n = 12 randomly selected observations?

Back

3.106.

Front

What is the format for interpreting a confidence interval?

Back

We are C% confident that the interval from ___ to ___ captures the [parameter in context].

Front

What is a confidence interval?

Back

A range of values used to estimate the true parameter of a population.

Front

What does a 95% confidence level mean?

Back

If we were to take many samples, 95% of the confidence intervals would contain the true population parameter.

Front

What is the relationship between confidence level and margin of error?

Back

Higher confidence levels result in larger margins of error.

Front

What is the formula for calculating the margin of error in a confidence interval?

Back

Margin of Error = Critical Value * Standard Error.