Question

A patient is sick with a certain infection where the treatment involves taking $20 drug that has a 90% chance of curing the infection. If that drug doesn't work, then the patient takes an $80 drug that is almost guaranteed to cure the infection. The table below displays the probability distribution of X= the total amount of money a randomly selected patient spends on this treatment plan.

X=total spent $20 $100
P(X) 90% 10%
Given that μ X= $28 calculate σX

σX= ?

Answer 1

Answer:

Step-by-step explanation:

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