Purchase Solution

# Random Standard Deviation

Not what you're looking for?

1. Bill has completed a ten question multiple choice test on which he answered seven questions correctly. Each question had one correct answer to be chosen from four alternatives. Bill says that he answered the test by randomly selecting the answers without reading the questions or answers.

a. What is the expected number of correct responses under these circumstances if one in fact selects the responses at random. What is the standard deviation?
b. What is the probability of Bill guessing seven of the ten answers correctly?
c. What is the probability that one could guess six or more answers correctly?
d. What do you think of Bill's claim? Explain.

##### Solution Summary

The solution addresses random standard deviation.

##### Measures of Central Tendency

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

##### 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.

##### 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.