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Lostsunrise [7]
3 years ago
12

please help me on this I'm struggling on this thanks for your helping of you answer.please show your work:-)

Mathematics
2 answers:
Tju [1.3M]3 years ago
7 0
<span>A fraction that represents the same value when both the numerator and the denominator are multiplied by the same number is known as an equivalent fraction. 

Part A: 5/20 

Equivalent fractions - 5/20,6/24,7/28

Percent : 

5/20

</span>Simplify = 1/4

<span>The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator. </span> 

= 1 ÷ 4

Decimal = 0.25

0.25 x 100 = 25%<span>


Part B: 9/20

</span>Equivalent fractions - <span>18/40,27/60,36/80 

Percent: 

</span>Fraction = 9/20


<span>The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator. 
</span>
= 9 ÷ 20

Decimal = 0.45

<span>0.45 x 100 = 45% 
</span><span>
Part C: 9/6

</span>Equivalent fractions -<span>12/8,15/10,18/12  

Percent: 9/6

</span>Simplify = 3/2


<span>The numerator is the top part of a fraction, and the denominator is the bottom part of a fraction. To convert to decimal divide the numerator and denominator. 
</span>
= 3 ÷ 2

Decimal = 1.5

<span>1.5 x 100 = 150% </span>
PilotLPTM [1.2K]3 years ago
6 0
A. is 1/4 so that would be 25%
sorry thats all i know
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Answer:

a. N=25

b. X[bar]= 60.52

c. Y[bar]= 106.72

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e. ∑X*∑Y = 4036684

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Step-by-step explanation:

Hello!

Using the attached data you need to calculate some statistics.

a) N

The sample size is listed under the first column "subject" You can see that 25 subjects qhere studied so N=25.

b.

The mean of set X is equal to X[bar]= ∑X/n= 1513/25= 60.52

∑X is listed in the second table.

c.

The mean of ser Y is Y[bar]= ∑Y/n= 2668/25= 106.72

∑Y is listed in the second table.

d.

Sum of Squares of set X SSx= ∑X²-[(∑X)²/n]= 91682-[(1513)²/25]= 115.24

e.

∑X*∑Y =1513*2668= 4036684

f.

SSxy= (∑X²-[(∑X)²/n]) * (∑Y²-[(∑Y)²/n])= (91682-[(1513)²/25]) * (286482*[(2668)²/25])= 202020.3296

g.

√(SSx*SSy)= √(115.24*1753)= 449.46

I hope you have a SUPER day!

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