Sales price of baseball cards from the 1960s are known to possesses a skewed-right distribution with a mean sales price of $5.25 and standard deviation of $2.80. suppose a random sample of 100 cards from the 1960s is selected . the sampling distribution for the sample mean sale price of the selected cards follows

Initial deposit was $33.35

Answernormal with a mean of $5.25 and a standard error of $0.28

Ithink is b. or c.

The answer is    (d) 7/2======we have    we also  have an integral      notice how function f splits up at x = 0. there's a left piece and a right pieceso we'll need to do the same thing with our integral: split it at x = 0we use a property of integrals that allows us to split up and sum:     notice that for the piecewise function f, the function has the equationf(x) = x when x  ≤ 0. so for the integral  , f(x) = x so it changes into      for the piecewise function f, the function has the equationf(x) = x+1  when x  > 0. for the integral  , we have    therefore, back to our splitted integral: