# Statistics - Finding Standard Deviation

Not what you're looking for?

** Please see the attached file for the complete problem description **

15) According to the empirical rule, what percent of data should fall between +/1 stdev? +/-2 stdev? +/- 3 stdev? How does this compare to the

a. Results for a random shape at 20 samples?

b. Results for a random shape at 200 samples?

c. Results for a bell shape at 20 samples?

d. Results for a bell shape at 200 samples?

16) How do the results from the random shape compare to the results from the bell shape? How did increasing the sample size change your assessment?

##### Purchase this Solution

##### Solution Summary

In this solution we explain how to solve a series of probability problems.

##### Solution Preview

** Please see the attached file for the complete solution **

I have answered the questions in the attached MS Word document that was in your posting. My answers are in green. Good luck.

According to the Empirical Rule, in a data set that is mound-shaped a symmetric approximately 68.3% of the data in the data set should fall between +/- 1 stdev of the (sample) mean; approximately 95.4% of the data in the data set should fall between +/- 2 stdev of the (sample) mean; and, 99.7% of all the data in the data set (so pretty much all of the values in the data set) should fall between +/- 3 stdev of the (sample) mean.

a. Results for a random shape at ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### 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

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.

##### 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.