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4 years ago

Fraction between 3/5 and 7/8?

Mathematics

2 answers:

olga55 [171]4 years ago

8 0

The fractions between 3/5 and 7/8 are:
4/5
1/6
5/6
1/8
3/8
5/8

MArishka [77]4 years ago

5 0

The fractions between 3/5 and 7/8 are:
4/5
1/6
5/6
1/8
3/8
5/8

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What is the range of possible lengths for the third side of a triangle that has side lengths of 7 and 10? WRITER ន I O

stira [4]

Answer:

3 < x < 17

Step-by-step explanation:

triangle inequality theorem: the sum of any two sides must be greater than the third

7 + 10 > x; x < 17

7 + x > 10; x > 3

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4 years ago

Find two integers who’s sum is 20 and products is 100

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Answer: 10

Step-by-step explanation:The answer is 10

Step-by-step explanation:

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Hope it helps you.

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2 years ago

-4x + 64 < 242 + 3x Giving extra points

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3 years ago

write the equation of a line that is parallel to the line y= 2x - 7 that passes through the point parentheses (4,-15)

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4 years ago

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained p

Alekssandra [29.7K]

Using the z-distribution and the formula for the margin of error, it is found that:

a) A sample size of 54 is needed.

b) A sample size of 752 is needed.

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

90% confidence level, hence $\alpha = 0.9$ , z is the value of Z that has a p-value of $\frac{1+0.9}{2} = 0.95$ , so $z = 1.645$ .

Item a:

The estimate is $\pi = 0.213 - 0.195 = 0.018$ .

The sample size is n for which M = 0.03, hence:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.018(0.982)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.018(0.982)}$

$\sqrt{n} = \frac{1.645\sqrt{0.018(0.982)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.018(0.982)}}{0.03}\right)^2$

$n = 53.1$

Rounding up, a sample size of 54 is needed.

Item b:

No prior estimate, hence $\pi = 0.05$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.5(0.5)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.5(0.5)}$

$\sqrt{n} = \frac{1.645\sqrt{0.5(0.5)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.5(0.5)}}{0.03}\right)^2$

$n = 751.7$

Rounding up, a sample of 752 should be taken.

A similar problem is given at brainly.com/question/25694087

5 0

3 years ago