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Standard Error of Sample Mean Guinea Pig Weight

APSTAT-BEV1H0

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

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

A

$2.8$

B

$5$

C

$8$

D

$13$

E

$116$