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Murljashka [212]
3 years ago
11

What is 18:4 equivalent to

Mathematics
2 answers:
Serhud [2]3 years ago
5 0
9:2 is equivalent to 18:4
NeX [460]3 years ago
3 0
It's equivalent to 9:2
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Circle each of the square numbers in this list 1,4,5,9,17,21,36,49,59,82,110,122,144
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Circle each of the square numbers in this list

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3 years ago
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Obtain the required confidence interval for the difference between two population proportions. Assume that independent simple ra
Thepotemich [5.8K]

Answer:

The 95% confidence interval for the difference between the proportions of women and men who follow a regular exercise program = ( -0.293, 0.023)

Step-by-step explanation:

The formula for confidence interval for the difference between the proportions is given as:

p1 - p2 ± z × √p1 (1 - p1)/n1 + p2(1 - p2)/n2

From the question

We have two groups.

Group 1 = For women

A survey found that 37 of 74 randomly selected women

p1 = x/n1

n1 = 74

x1 = 37

p1 = 37/74

p1 = 0.5

Group 2 = For Men

A survey found out that 47 of 74 randomly selected men follow a regular exercise program

p2 = x/n1

n2= 74

x2 = 47

p2 = 47/74

p2 = 0.6351351351 ≈ 0.635

z = z score for 95% Confidence Interval = 1.96

The confidence interval for the difference between the proportions is given as:

p1 - p2 ± z × √p1 (1 - p1)/n1 + p2(1 - p2)/n2

0.5 - 0.635 ± 1.96 × √0.5 (1 - 0.5)/74 + 0.635(1 - 0.635)/74

-0.135 ± 1.96 × √(0.5 × 0.5)/74 + (0.635× 0.365)/74

-0.135 ± 1.96 × 0.08068750209663572

-0.135 ± 0.158147504109406

Hence:

= -0.135 - 0.158147504109406

= -0.2931475041

Approximately = -0.293

= -0.135 + 0.158147504109406

= 0.0231475041

Approximately = 0.023

Therefore, the 95% confidence interval for the difference between the proportions of women and men who follow a regular exercise program = ( -0.293, 0.023)

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2 years ago
Select the postulate that is illustrated for the real numbers 5+(-5)=0
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In this question , we have to find the postulate that is illustrated for the real numbers

5+(-5) = 0

The postulate is Additive inverse postulate which states that

a+ (-a) =0

Where a is the real number and -a is the opposite of a. It states that , if opposite of a number is added with the number, the result is 0 .


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Step-by-step explanation:

explanation is in the image above

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