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Marysya12 [62]
2 years ago
15

A Sociology student investigated the association between a country’s Literacy Rate and Life Expec- tancy, and then drew the conc

lusions listed below. Explain why each statement is incorrect. (Assume that all the calculations were done properly.)
a) The determines 64% of the Life Expectancy for a country.
b) The slope of the line shows that an increase of 5% in will produce a 2-year improvement in
Mathematics
1 answer:
Scrat [10]2 years ago
5 0

Answer:

Step-by-step explanation:

(a) R2 does not determine the level of correlation between two variables in statistics but rather it is used to determine the level of variance in a dependent variable that is explained by an independent variable. It is also known as coefficient of determination.

Pearson's correlation coefficient (r) will better explain a direct relationship between a country's literacy rate and life expectancy and the value obtained will better explain option a

(b) The slope of the line can predict an improvement in life expectancy but cannot guarantee this improvement. And as such, the use of the word "will" suggests a form of guarantee which is wrong in interpreting slopes.

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suter [353]

Answer:

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Hope this helps :)

7 0
3 years ago
Do u know whats 103,727,495 in word for and expanded form
Studentka2010 [4]

Answer:

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5 0
2 years ago
1. Write an algebra equation for each purchase. I (Mickey) bought an ice cream treat and a bottle of water for $10. Pam purchase
Ne4ueva [31]

x+y=10

x+2y=14
x is common in both so u have to subtract the second one from 1st
x-x + y-2y = 10-14
-y = -4
y=4
which means bottle of water (y) = 4
and then substitute 4 in equation (x+y=10 or x+2y=10)
x + 4 = 10
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5 0
3 years ago
HELP FAST LAST QUESTION ON TEST!!! The front lawn of NPHS has a roped off area of 2x? - 11x + 15. What are the
nexus9112 [7]

Answer:the area is = the length*the width

2x^2-11x+15= (2x-5)* the width

you have to divide 2x^2 - 11 x + 15 at 2x-5

2x^2-11x+15   |  2x-5

-2x*2+5x                 x-3

-------------

/       -6x+15

       +6x-15

-----------------

         /   /

the answer is X-3

Step-by-step explanation:

6 0
2 years ago
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