Starting salaries for accounting majors have a population mean of $50,000 and a population standard deviation of $4,000. What is probability of an individual starts at:
Over $55,000
Between $48,000 and $55,000
Under $49,000.

Question

Starting salaries for accounting majors have a population mean of $50,000 and a population standard deviation of $4,000. What is probability of an individual starts at:
Over $55,000
Between $48,000 and $55,000
Under $49,000.

amistre64 · Answer

what tools do you hav eto work with?  tabels, calculators? etc ...

anonymous · Answer

Anything.

amistre64 · Answer

then use a normalcdf function

amistre64 · Answer

normalcdf(low, high, mean, sd)

for infinity i just use a large value like -9999 or 9999

anonymous · Answer

a) 0.1056, correct?

amistre64 · Answer

the wolf isnt behaving for me ... ill have to work the z scores

55-50 = 5,  z = 5/4

P(z>5/4) = .10565  so yeah thats about right

amistre64 · Answer

the normalcdf is just another way to express: P(a<z<b)

anonymous · Answer

thanks, about to give another problem that's similar.

amistre64 · Answer

oh good, then the solution process will be similar :)