Purchase Solution

Binomial Distribution and Probability Problems

Not what you're looking for?

Ask Custom Question

Please explain the steps to solve the problems.

The number of correct answers on a 10 questions test has Binomial Distribution with parameters n= 10 p= 0.40:

16- Find P( X > 7):
A) 0.43 B) 0.013 C) 0.23 D) 0.68

17- Find the expected number (mean) of correct answers by student.

A) 10 B) 5 C) 6 D) 4

18- Find the standard deviation of the number of correct answers by student.

A) 2.61 B) 1.55 C) 1.19 D) 2.91

19. For a standard normal distribution Z, find the value of 'b' such as P ( 0 < Z < b) = 0.3907

A) 1.94 B) 1.23 C) 2.05 D) 3.41

Purchase this Solution

Solution Summary

The solution provides a step by step method for the calculation of binomial and normal probabilities. Formula for the calculation and interpretations of the results are also included.

Solution Preview

Please see the attachments.

Binomial Distribution Correct Answers
The number of correct answers on a 10 questions test has Binomial Distribution with parameters n= 10 p= 0.40:
Answers
Let X be the number of correct answers on the test. Clearly X is binomial with n = 10 and p = 0.40.The probability ...

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

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

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.