Probability distribution in statistics pdf

For a random sample of 50 mothers, the following information was obtained. X takes on the values 0, 1, 2, 3, 4, 5. This is a discrete PDF because we can count the number of values of x and also because of the following two reasons:. A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a hour shift.

For a random sample of 50 patients, the following information was obtained. Why is this a discrete probability distribution function two reasons? Suppose Nancy has classes three days a week. She attends classes three days a week 80 percent of the time, two days 15 percent of the time, one day 4 percent of the time, and no days 1 percent of the time. Suppose one week is randomly selected. Describe the random variable in words.

In this example, what are possible values of X? Suppose one week is randomly chosen. Construct a probability distribution table called a PDF table like the one in Example 4. The table should have two columns labeled x and P x. The sum of the P x column is 0. Jeremiah has basketball practice two days a week.

Eight percent of the time, he attends one practice. Two percent of the time, he does not attend either practice. What is X and what values does it take on? As an Amazon Associate we earn from qualifying purchases. Want to cite, share, or modify this book? This book is Creative Commons Attribution License 4. Ninety percent of the time, he attends both practices.

Eight percent of the time, he attends one practice. Two percent of the time, he does not attend either practice. What is X and what values does it take on? As an Amazon Associate we earn from qualifying purchases. Want to cite, share, or modify this book? This book is Creative Commons Attribution License 4. Skip to Content Go to accessibility page.

Introductory Statistics 4. My highlights. Table of contents. A discrete probability distribution function has two characteristics: Each probability is between zero and one, inclusive. The sum of the probabilities is one. X takes on what values? Previous Next. Order a print copy As an Amazon Associate we earn from qualifying purchases.