STA 210 Exam 2 Review

Sampling error occurs when we take a sample that is not representative of the population.

Confidence Intervals

When can the empirical rule be used?

Which survey error is accounted for by the margin of error?

The Empirical Rule

Use the empirical rule to estimate the probability of a gorilla living longer than 14.3 years.

A biased sample

Which is an example of a processing error for a survey?

For a given sample, which interval has the smallest margin of error?

What can you say about a sampling distribution of a sample statistic based on a SRS?

How can you reduce the margin of error?

If twenty 95% confidence intervals are built for a sample, about how many would we expect to catch the true parameter?

Find the 95% confidence interval for the true mean

A sampling distribution of a statistic is the distribution of

The following confidence interval is obtained for a population mean: (424, 460). What is the margin of error?

What is true about a parameter?

Interpret the meaning of the 90% confidence level of the interval (3.55, 7.55).

400 students are surveyed and 82% say they like ice cream. What is the 95% margin of error based on this survey?

Which question is most likely to result in a non-response error?

What is the population?