Interval Estimates

Front

What is the term for the amount of random sampling error in the results of a survey?

Back

Margin of Error

Front

What do you call the value resulting from adding the margin of error to the sample mean?

Back

Upper limit of the interval

Front

Which of the following illustrates a confidence interval?

Back

54-59

Front

In a survey showing an average reading time of 18.5 hours per week with a margin of error of 2.2 hours, what is the margin of error?

Back

2.2

Front

What percentage illustrates a confidence level?

Back

95%

Front

Define 'confidence interval'.

Back

A range of values derived from a sample that is likely to contain the population parameter with a specified level of confidence.

Front

What is a 'point estimate'?

Back

A single value estimate of a population parameter.

Front

What does a confidence coefficient represent?

Back

The probability that the confidence interval contains the true population parameter.

Front

How is the lower limit of a confidence interval calculated?

Back

By subtracting the margin of error from the point estimate.

Front

What is the formula for calculating the margin of error?

Back

Margin of Error = Critical Value * Standard Error.