Question

In: Math

In a large city’s recent mayoral election, 131,506 out of 309,153 registered voters actually turned out...

In a large city’s recent mayoral election, 131,506 out of 309,153 registered voters actually turned out to vote. If 20 registered voters are randomly selected, find the probability that 7 of them voted in the mayoral election. Use a TI-83, TI-83 plus, or TI-84 calculator to find the probability.

Expert Solution

Solution:

Given: In a large city’s recent mayoral election, 131,506 out of 309,153 registered voters actually turned out to vote.

Thus

p =probability of people voted

p = 131506 / 309153

p = 0.425375

n = Sample size = Number of registered voters are randomly selected

n = 20

Thus x follows Binomial( n = 20 , p = 0.425375 )

We have to find P(X = 7 )= .......? using TI-83, TI-83 plus, or TI-84 calculator.

Use following steps in TI 84calculator:

Press 2ND

Press VARS

Select binompdf(

Enter Numbers:

Click on Paste and press Enter two times.

Thus

P( X = 7 ) = 0.145484

P( X = 7 ) = 0.1455

milcah answered 1 week ago

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