# Posts by LUA

Total # Posts: 3

**math: standard deviation**

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**

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?

**Physic**

If you shout across a canyon and hear the echo 0.57 s later, how wide is the canyon?