I am in an AP Stat class and am having a hard time figuring out a problem. Any help would be appreciated.?
Tuesday, June 1st, 2010 at
7:37 pm
A headache remedy is said to be 80% effective in curing headaches caused by simple nervous tension. An investigator tests this remedy on 100 randomly selected patients suffering from nervous tension.
What is the probability that between 75 and 90(inclusive) of the atients will obtain relief.
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Filed under: Tension Headache Relief
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Hello.
I hope you have a graphing calculator because this is quite tedious to do by hand. First, you’ll have to take the binomial probability of 90 and 70, and then subtract them. So by using a TI-83 or 84 calculator, type in “binomcdf(100,8/10,90) – binomcdf(100,8/10,75) =”
Good luck!