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2 years ago

CAN SOMEONE PLEASE HELP ME ASAP! (SHOW YOUR WORK)

Mathematics

2 answers:

Sergio039 [100]2 years ago

4 0

Answer:

Step-by-step explanation:

-5/3 + -5/4

-50/12 + -15/12 = -65/12 = -5 5/12

navik [9.2K]2 years ago

3 0

Answer:

-2 11/12

Step-by-step explanation:

-1 2/3 = -5/3

=> -5/3 -5/4

Do LCM,

=> -20/12 -15/12

=> (-20-15)/12

=> -35/12

=> -2 11/12

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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:

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Step-by-step explanation:

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