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cricket20 [7]
3 years ago
7

Casey likes to.she runsan additional 1/4 mile each day. on the last day she ran 1 1/4 miles. if she ran 1/2 mile her first day f

or
how many days has she been running
Mathematics
1 answer:
bonufazy [111]3 years ago
3 0
<span>1st day (2/4)
2nd day (3/4)
3rd day (4/4)
4th day 1 1/4      So she has been running for four days. ( I didnt know if you needed miles or not but, here you go ) <3</span>
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Step-by-step explanation:

Data : 3 , 5 , 12 , 3 , 2

We are given that The mean of the sample is 5.

Formula of standard deviation =\sigma = \sqrt{\frac{\sum(x-\bar{x})^2}{n}

Substitute the values :

\sigma = \sqrt{\frac{(3-5)^2+(5-5)^2+(12-5)^2+(3-5)^2+(2-5)^2}{5}}=3.633

Coefficient of variation=\frac{\sigma}{\mu} \times 100=\frac{3.633}{5} \times 100 =72.66\%

Hence The coefficient of variation is 72.66%

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