Question

math please help!
question posted below

Answer 1

can you help me @amiliver @Hoa

Answer 2

@mathstudent55

Answer 3

i think its b

Answer 4

why do you think it's b?

Answer 5

wait no it would be a because the mean is the same

Answer 6

so if the mean is the same the standard deviation would be also the same right?

Answer 7

im confused

Answer 8

new mean\[\mu'=2\times31.25=?\\
\sigma'=\sqrt{{1\over N}\sum(2x-2\mu)^2}=2\sigma
\]so, the std. dev also doubles.

Answer 9

@natalia517 kapeesh?

Answer 10

so if its doubled would it just be 34.034

Answer 11

@electrokid

Answer 12

right.

Answer 13

okkkkayy gotcha. so it was kind of a trick queation because everything was doubled basically

Answer 14

yep