Question

A large study of over 5000 patients found that 18% of patients who used Drug A...

A large study of over 5000 patients found that 18% of patients who used Drug A had bad headaches

as a side effect. The ABC Health Agency randomly selects groups of 70 people from this study and

records the amount of people who get headaches as a side effect.

a) Suppose in one of the random groups of 70 people, 11 develop headaches. If we are interested in a

proportion, which statistic is this? Give its symbol and name.

b) Find the value of the statistic referred to in a).

c) What is the expected value (mean) and standard deviation of this statistic’s sampling distribution?

d) Why is it appropriate to use the normal distribution for this sampling distribution

Math   Statistics-And-Probability   
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