Posted by **LUA** on Saturday, January 19, 2013 at 1:03pm.

Calculate the standard deviation for the following yields of corn: 142, 161, 132, 143, 147, 145, 146, and 152 bu/ac.

Are all yields obtained within one standard deviation of the mean?

- math standard deviation -
**PsyDAG**, Sunday, January 20, 2013 at 1:05pm
Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

Without even calculating the SD, the answer is no. ±1 SD is only about 68% of the scores.

## Answer This Question

## Related Questions

- math: standard deviation - Calculate the standard deviation for the following ...
- Algebra - Use a calculator to find the mean and standard deviation of the data. ...
- Statistics - 1) A Motor Company has purchased steel parts from a supplier for ...
- Math - Roughly speaking, the standard deviation indicates how far, on average, ...
- Stastics - When we convert x-value to z- score and use Standard Normal ...
- Statistics - A college statistics class conducted a survey of how students spend...
- math - hi i need help calculating the standard error using the central limit ...
- math - Suppose x is a random variable with mean and standard deviation. If a ...
- Statistics - hi i need help calculating the standard error using the central ...
- Statistics - Check my answers please! Thanks a lot. Five students reported that ...

More Related Questions