Answer:
The 99% confidence interval estimate of the proportion of people who say that they voted is (0.6623, 0.7369).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of .
In a survey of 1002 people, 701 said that they voted in a recent presidential election.
This means that
99% confidence level
So , z is the value of Z that has a p-value of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 99% confidence interval estimate of the proportion of people who say that they voted is (0.6623, 0.7369).
Answer:
the firtst part is 2 2
c11 = -1
c12 = 3
c21 = 3
c22 = -3
the next part is
d11 = 0
d12 = 6
d21 = 1
d22 = -4
Step-by-step explanation:
did it on edg 2020
Answer: If you are just wanting to multiply x and 1, the answer would be x.
1*1+x2x = 1+x^3
Step-by-step explanation: Multiply x by 1.
Question #2 : Simplify the expression.
I hope this helps you out. I am really sorry if it doesn't.
Answer:
(a) 53%
(b) 25%
Step-by-step explanation:
There are 51 families who are Not a Homeowner and who own No car or one car, and there are 108 families who are Not a Homeowner and who own Two or more cars. You can add these two numbers together to find how many families are <u>only</u> not a Homeowner - no matter how many cars they own the question doesn't ask that. You do the same thing for question b; you add up 24 and 51 to get 75 total families who have no car or one car. However, despite all that I've said, the question asks for a percentage. So you have 159 families for question a. Just divide 159 by 300 and that'll give the decimal that you need to convert into a percent. It'll be 53%. And for question b, you have 75 families out of 300 who have no car or one car. So do 75 divided by 300 and you'll get 25%.
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Define x:
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Let x be the number of games downloaded.
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Members:
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Membership = $50
Per download = $2
Total cost = 50 + 2x
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Non-Members:
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Per download = $20
Total Cost = $20x
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Calculate number of games needed for the membership to be worth it:
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50 + 2x < 20x
50 < 18x // take away 2x from both sides
2.78 < x // divide by 18 on both sides
x > 2.78 // rewrite with x on the left side
⇒ at least 3 games.
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Answer: the members must download more than 3 games to save money compared to non-member.
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