Question

The annual salary for a certain job has a normal distribution with a mean of $54,000 and a standard deviation of o = $5000 1. Which sample size would allow us to use the normal approximation?n= all can be used + (Click to view hint) 2. What is the probability that the mean salary of random sample of 100 workers is no more than $54, 215? a = (Do not include the dollar sign) b. = (Click to view hint) c. Which picture (below) shows the requested area? Curve 2 Curve Image Curve 1 10 20 Ba Curve 2 LE -20

The annual salary for a certain job has a normal distribution with a mean of $54,00054,000 and a standard deviation of σ=$5000σ=$5000.

Answer 1

g tine we have to calculate Pl X L54215 which i denoted in Curve 2 Hire et) so y un 54 54000 50002 loo flon Z: 7 - 59000 unlod Soon From so Pla L 54215) ff 7 - 54000 s 54215 - 54000 south too sooooo PLZ 20:43 >> LX059295 04664 e) be there is 66.64 chance that mean size of sandom sample is no more than $54,215

S PLX>65) = L- PCX565) H 2 here N180, 12) Mio soplx 65)= |- P(XL 65 I NORM DIST (65, 80, 12, Extmutatives? - 1-0 = 1 = P(x>65)