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3 years ago

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A group surveyed a mix of people below and above 40 years old about whether or not they visit a dentist once a year. This table

gives the survey results.
Visit Dentist Yearly Don’t Visit Dentist Yearly
Below 40 8 22
Above 40 17 13

Which table shows the relative frequency of people above 40 years old who do not visit a dentist once a year? Round your answers to the nearest hundredth.

2 answers:

grigory [225]3 years ago

6 0

Answer with Step-by-step explanation:

Visit Dentist Yearly Don’t Visit Dentist Yearly

Below 40 8 22

Above 40 17 13

Relative frequency of people above 40 years old who do not visit a dentist once a year

=Number of people above 40 years old who do not visit a dentist yearly/Number of people above 40

=13/(17+13)

=13/30

=0.43

Hence, Relative frequency of people above 40 years old who do not visit a dentist once a year is:

0.43

il63 [147K]3 years ago

3 0

Answer: is D

Visit Dentist Yearly Don’t Visit Dentist Yearly

Below 40 0.27 0.73

Above 40 0.57 0.43

Work: 8+22=30 17+13=30 turn into a fraction then simplify to get answer;

22/30 simp= 73.0 (0.73)

13/30 simp= 43.0 (0.43)

8/30 simp= 26.667 (0.27)

17/30 simp= 56.667 (0.57)

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Step-by-step explanation:

Answer:

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Showing Work

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Answer:

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Step-by-step explanation:

Given points are: ( 1 , 3 ) , ( 2 , 3 ) and ( 3 , 6 )

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<u>1) Finding $(\overline{x},\overline{y})$ </u>

Average of the x coordinates:

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Average of the y coordinates:

similarly for y

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<u>2) Finding the line through $(\overline{x},\overline{y})$ with slope m.</u>

Given a point and a slope, the equation of a line can be found using:

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in our case this will be

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So what we up till now is a line, and three points. We need to find how much further away (only in the y direction) each point is from the line.

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We know that when x=1, y=3 for the point. But we need to find what does y equal when x=1 for the line?

we'll go back to our equation of the line and use x=1.

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$y=-m+4$

now we know the two points at x=1: (1,3) and (1,-m+4)

to find the vertical distance we'll subtract the y-coordinates of each point.

$d_1=3-(-m+4)$

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finally, as asked, we'll square the distance

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we'll do the same as above here:

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Looking at the equation above, we can tell that R is a function of m:

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