Probability

[dcc3038026]

Can You Find The Probability Using The Normal Curve Approximation To The Binomial Distribution?
On a hospital floor, 60 patients have a disease with a mortality rate of 0.1. Five of them die.

Here is my work but it's not correct, can anyone see what I'm doing wrong?
[attachment=0:s59l586y]Q32Answer.JPG[/attachment:s59l586y]

 

[tkhunny]

You have calculated the binomial probability. The problem statement suggest a Normal Approximation. You will need the Mean and Standard Deviation of your Binomial Distribution.

Also, you will have some difficulty calculating the Normal Probability of EXACTLY 5 deaths. That answer to that is obvious and is zero (0)! It it the nature of continuous distributions. You may wish to calculate p(5 or fewer deaths). Alternatively, you could calcualte p(<5.5) - p(<4.5). You need some strategy to adjust for the switch from a discrete distribution to a continuous distribution.