{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# What percent of people take more than 80 minutes to

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: test. What percent of people take more than 80 minutes to complete the test? What if our values are not exactly within one, two or three standard deviations from the mean? Probabilities for these can still be found a number of ways, one of which we will explore in the next section. Using R, the probability can be found with the command pnorm(X, µ, σ). Note that the command in R only gives the probability that X is less than a given value. If we need to find the probability that X is greater than the given value, we will need to subtract the answer from 1. With the TI-83 and TI-84 calculator, the command is normalcdf(lower_limit, upper_limit, µ, σ). Continuing the example above, What is the probability that someone will take less than 45 minutes to complete the test? What is the probability that someone will take more than 30 minutes to complete the test? How long would it take someone to finish the test if they are in the top10% of the times?...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online