To calculate the standard deviation of those numbers:<span>
1
Work out the Mean (the simple average of the numbers)
2
Then for each number: subtract the Mean and square the result.
Then work out the mean of those squared differences.<span>Take the square root of that and we are done!</span></span>
<span>6x7-3^2x9+4^3
= 42 - 9x9 + 64
= 42 - 81 + 64
= 25</span>
Answer:
seconds
Step-by-step explanation:
