# Tree Diagram and Probability

Not what you're looking for?

A course in statistics is one of the most difficult at the local university. Because of this, for the past decade the university has arranged for teaching assistants to hold frequent discussion sessions as part of the course. Since the inception of the discussion sessions, 50% of the students enrolled in the course regularly attended the sessions, and the other 50% did not. Students regularly attending the sessions have performed better than those not regularly attending. In particular,65% of the students regularly attending the sessions received a grade of "B" or higher in the course, while only 40% of the students not regularly attending the sessions received a grade of "B" or higher in the course.

Let D denote the event that a randomly chosen student (enrolled in the course) regularly attended the discussion sessions, and let D ̅denote the event that a randomly chosen student did not regularly attend the discussion sessions. Let B denote the event that a randomly chosen student received a grade of "B" or higher in the course, and let B ̅ denote the event that a randomly chosen student did not receive a grade of "B" or higher in the course. Fill in the probabilities to complete the tree diagram below, and then answer the question that follows. Do not round any of your responses.

SEE ATTACHMENT FOR A DIAGRAM.

##### Purchase this Solution

##### Solution Summary

The solution gives the detailed steps involved in the calculation of probability

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.