A waiter received $3 tip. If the check totaled $25, what percent tip was received?
1 answer:
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Answer:
s = 19.7
Step-by-step explanation:
First we need to calculate the mean x' of the sample as:
We sum all the scores and divide them by the number of scores.
Then, the standard deviation s is calculated as:
We square every score less the mean, sum every value, then divide that by the number of scores less 1 and finally, we calculate the square root.
So, the standard deviation of the sample is 19.7