Treatment providers for problem gamblers report that men who approached them for intervention had lost a mean of $2,849 in the preceding four weeks, according to a 2002 report. Assume that the distribution of gambling losses is normally distributed with a mean of $2,849 and a standard deviation of $900. What proportion of males lost between $3000 and $4000? A.
pnorm(3999,2849,900)-pnorm(2999,284 9,900) = 0.3332

B.
pnorm(3999,2849,900)-pnorm(3000,284 9,900) = 0.3327

C.
pnorm(4000,2849,900)-pnorm(3000,284 9,900) = 0.3329

D.
pnorm(4000,2849,900)-pnorm(2999,284 9,900) =0.3333