Thirty-three percent of work injuries are back injuries. If 500 work-injured people are selected, find the probability that 140 or fewer have back injuries. HINT: Check to see if you can estimate this to a binomial distribution. If so, use the corresponding formulas to find the mean and standard deviation, then use Z formula and Table E.

Find Mean:

Find Standard Deviation:

Find Z-score value:

Round first 3 answers to 2 decimal places, ex: 0.88

State the probability of (P< 140):

Provide answer as listed in Table E