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3 years ago

PLS HELP ASAP THIS IS DUE IN 10 MINUTES

Mathematics

1 answer:

olchik [2.2K]3 years ago

8 0

Answer:A number decreased by 40

Step-by-step explanation: I really don't feel like explaining this lol...

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A health research institute collects information from 20 individuals on the number of years they have spent smoking cigarettes,

olga55 [171]

The correlation coefficient of the health research institute data measures the relationship between the age and the years of the smokers

The correlation coefficient is 0.53

<h3>How to calculate the correlation coefficient</h3>

The correlation coefficient (r) is calculated as:

$r = \frac{n(\sum xy) - \sum x \sum y}{\sqrt{[n \sum x^2 - (\sum x)^2][n\sum y^2 - (\sum y)^2}}$

Using the given parameters, we have:

$r = \frac{20 *8249 - 1257* 116}{\sqrt{[20 * 98823 - 1257^2][20 * 836 - 116^2}}$

Evaluate the exponents

$r = \frac{20 *8249 - 1257* 116}{\sqrt{[20 * 98823 - 1580049][20 * 836 - 13456}}$

Evaluate the products

$r = \frac{164980 - 145812}{\sqrt{[1976460 - 1580049][16720 - 13456}}$

Evaluate the differences

$r = \frac{19168}{\sqrt{[396411*3264}}$

Evaluate the product

$r = \frac{19168}{\sqrt{1293885504}}$

Evaluate the root

$r = \frac{19168}{35970.6}$

Evaluate the quotient

$r = 0.53$

Hence, the correlation coefficient is 0.53

Read more about correlation coefficient at:

brainly.com/question/1564293

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2 years ago

Consider the graph below, and identify the piecewise function that describes it. An image of a graph. Question 12 options: f(x)=

serious [3.7K]

Answer:

20000

Step-by-step explanation:

HOPED THIS HELPED

A brainlyist is always appreciated

GOOD LUCK

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2 years ago

Determine the indicated angle in the triangle to the nearest degree

Dmitry [639]

No image? cvccfgfyfyfcy

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3 years ago

PLEASE HELP. i need to show my work for<br> the correct answer. please help

e-lub [12.9K]

Answer:

I THINK IM WRONG BUT

Step-by-step explanation:

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3 years ago

the tempature dropped 8 degrees between 6:00 p.m. and midnight. The tempature at midnight was 26 degreesF. Write and solve an eq

sashaice [31]

D=degrees at 6

26-8=d
d=18

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3 years ago

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