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Jackson weighed all of his pet guinea pigs and found the average weight to be $2.4\text{ pounds}$.

If the standard error of the sample mean was $0.2227$ and the sample standard deviation was $0.63\text{ pounds}$, how many guinea pigs does Jason have?

A

$2.8$

B

$5$

C

$8$

D

$13$

E

$116$

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