Posted by **mike** on Monday, April 29, 2013 at 7:15pm.

a quiz consists of 30 true or false questions. if the student guesses on each question, what is the standard deviation of the number of correct answers

- statistics -
**PsyDAG**, Tuesday, April 30, 2013 at 2:30pm
The Range Rule

The range rule tells us that the standard deviation of a sample is approximately equal to one fourth of the range of the data. In other words s = (Maximum – Minimum)/4. This is a very straightforward formula to use, and should only be used as a very rough estimate of the standard deviation.

## Answer this Question

## Related Questions

- LBCC - A multiple choice quiz consists of 20 questions, each with 3 possible ...
- stat probability - A multiple choice quiz consists of 20 questions, each with 3 ...
- STAT - A student takes a ten-question true-false quiz, but did not study and ...
- statistics - An unprepared student makes random guesses for the ten true-false ...
- Statistics - Please help. Find the probability of getting 2 hearts if the cards ...
- statistics - a test consists of true/false questions .to pass the test a student...
- statistic - A statistics quiz consists of 10 multiple questions. There are four ...
- Statistics - A true-false test consists of 20 questions, each of which has one ...
- Probability - Please help.. Find the probability of getting 2 hearts if the ...
- Finite Math - A biology quiz consists of 10 multiple -choice questions. 7 must ...

More Related Questions