the probability that a junior who has taken course a has also taken course b

What is the probability that a random variable is greater than or equal to z standard deviations from the mean in?

The probability that a random variable is greater than or equal to z standard deviations from the mean in a standard normal distribution is p%. What can be said with certainty about the probability that the random variable is less than or equal to -z standard deviations from the mean?

How to study applications?

Start studying Applications with Standard Normal Distribution Assignment and Quiz 80%. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

How long is a marathon?

The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation of 30 minutes. What is the probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes? Use the portion of the standard normal table below to help answer the question.

Is probability equal to p%?

The probability is not equal to p%.

Is cholesterol a risk factor?

Cholesterol levels in the blood are an important health measure. High cholesterol is a risk factor of serious conditions, such as heart disease. This table shows the general guidelines for total cholesterol scores.