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Evgen [1.6K]
3 years ago
11

08.01)Sam wants to know how many families in his neighborhood plan to attend the neighborhood cookout. He puts all 100 of the ne

ighborhood addresses in a hat and draws a random sample of 25 addresses. He then asks those families if they plan to attend the cookout. He finds that 15% of the families plan to attend the cookout. He claims that 15% of the neighborhood families would be expected to attend the cookout. Is this a valid inference?
Yes, this is a valid inference because he took a random sample of the neighborhood
Yes, this is a valid inference because the 25 families speak for the whole neighborhood
No, this is not a valid inference because he asked only 25 families
No, this is not a valid inference because he did not take a random sample of the neighborhood

I think yes because he took a random sample, and the found the percent and multiplied it by the total number of families
Mathematics
2 answers:
jarptica [38.1K]3 years ago
8 0
The answer is Yes, this is a valid inference because he took a random sample of the neighborhood. Hope it help!
balandron [24]3 years ago
6 0

Yes, this is a valid inference because he took a random sample of the neighborhood

Hope this helped!

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Please, help thanks!<br> I would like an explanation how to do it too, IF you dont mind.
Aneli [31]

Answer:

Phoebe has £180, Andy has £60, and Polly has £30.

Step-by-step explanation:

Ok, to start of let's establish some variables! We'll give Phoebe the variable "p", Andy the variable "a", and Polly the variable "o". By giving each person a variable we can create an equation and solve for it!

<em>So, what do we know?</em>

Well we know the following information...

<em>p + a + o = 270</em>

(Phoebe + Andy + Polly = £270)

<em>p = 3a</em>

(Phoebe = 3 times more than Andy)

<em>a = 2o</em>

(Andy = 2 times more than Polly)

To be able to solve this equation we have to solve for just one variable first.<em>The only one we can use is "o" for Polly!</em>

<em></em>

3(2o) + 2o + o = 270

6o + 2o + o = 270 (Distribute 3 to get like terms)

9o = 270 (Combine like terms [6+2+1])

o = 30 (Divide by 9 on both sides to get "o" by itself)

Now that we have how much Polly has, we have to solve for Andy and Phoebe. <em>(To do this we will input our value, 30, where our variable is "o")</em>

<em></em>

<u>Andy</u>

a = 2(30) (Input term)

a = 60 (Multiply by 2 to get final answer)

<em>(Since we now know what Andy has we can input 60 into our "a" variable to solve for Phoebe)</em>

<u>Phoebe</u>

p = 3(60) (Input term)

p = 180 (Multiply by 3 to get final answer)

Now! Just to check we are going to input our variables into our original equation to be sure we have the right variables.

p + a + o = 270

180 + 60 + 30 = 270!!

Hope this Helps! :)

<em>Have any questions? Ask below in the comments and I will try my best to answer.</em>

-SGO

<em></em>

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BartSMP [9]
19/38 is not reduces. Numerator and denominator can be divided by 19.
It can be reduced to 1/2
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A certain aircraft can carry a maximum cargo weight of 1300 pounds. If the baggage weighs no more than 210 pounds, what is the l
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The answer is 1090 pounds because 1300, the max weight, minus 210, the baggage, is 1090. Hope this helps!
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The slope and its opposite reciprocal slope form a _____ angle.
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Answer:

90 degree

Step-by-step explanation:

I just know (I don't I just need points). : )

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Step-by-step explanation:

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