Mathematics, 19.02.2021 09:00 bellam302

2) 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.

a) What is the probability that at least 90 of the subjects experience headache relief
with this remedy?

b) Would it be appropriate to use a normal approximation to solve the previous
question? Why?

c) Calculate the mean and standard deviation of this binomial distribution.

d) Using a normal approximation, find the probability that at least 90 of the subjects
experience headache relief with this remedy?

Answers: 1

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