1. In a clinical trial of a cholesterol drug, 226 subjects were given a placebo, and 25% of them developed headaches. For such randomly selected groups of 226 subjects given a placebo, identity the values of n, p and q that would be used for finding the mean and standard deviation for the number of subjects who develop headaches

the value of n is=

the value of p is=

the value of q is=

find the the mean and standard deviation for the number of subjects who developed headaches =

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Assume that a procedure yields a binomial distributions with b trials and the probability of a success for one trial is p. Use the given value of n and p to find the mean and standard deviation . Also use the tang rule of thumb to find the minimum usual value - 2 and the maximum usual value + 2

n=1560

p=4/5

=