Find the mean & St. Dev for each. MeanSt. Dev X83 Y124.

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Presentation transcript:

Find the mean & St. Dev for each. MeanSt. Dev X83 Y124

Find the mean & standard deviation xp(x)

BINOMIAL DISTRIBUTION FORMULA Section 6.3A

Binomial Experiment - BINS Binary? There are two possible outcomes – success and failure Independent? Trials must be independent Number? The number of trials must be fixed – out of n…. Success? On each trial the probability of success must be the same

Let E be the event that a person goes out shopping on Black Friday. Find the probability distribution for a sample of 3 people if the P(E) =.78.

Probability distribution of going shopping on black Friday for 4 people. P(E) =.78

Let’s Develop the formula!

Binomial Distribution where

The survival rate for a risky operation is 80%. What is the probability that exactly 4 of the next 5 patients survive?

USA today stated that 45% of Americans know somebody who became addicted to a drug other than alcohol. If we randomly ask 15 people, what’s the probability that exactly 3 were addicted?

What’s the probability that at least 12 are addicted?

What the probability that less than 3 are addicted?

90% of the trees planted by a landscaper will survive. If 10 trees are planted, what’s the probability more than eight survive?

The probability that a person will subscribe to Statistics Monthly is 48%. Find the probability that out of a group of seven, at least one person subscribes.

There are charts as well – but only for some probabilities so you need to know the formula.

Homework Worksheet