It is believed that approximately 70% of Americans under the age of 70 have health insurance....

It is believed that approximately 70% of Americans under the age of 70 have health insurance. If this is true, let X denote the number of Americans with insurance out of a random sample of n=20 individuals.
1. i. How is X distributed?

ii. What is the mean of X?

iii. What is the variance of X?

iiii. What is the probability that 10 individuals have health insurance?

iiiii. What is the probability that at least 10 individuals have health insurance?

iiiiii. What is the probability that at most 10 individuals have health insurance?

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orchestra answered 1 year ago

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