Aclinical test on humans of a new drug is normally done in three phases. phase i is conducted with a relatively small number of healthy volunteers. for example, a phase i test of a specific drug involved only 66 subjects. assume that we want to treat 66 healthy humans with this new drug and we have 99 suitable volunteers available. complete parts (a) through (c) below.

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answer for #1 is c

answer for #2 is d

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: