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2 years ago

Giving brainily if ur correct

Mathematics

2 answers:

sdas [7]2 years ago

6 0

The answer is c hope it was right ???!!,...

yKpoI14uk [10]2 years ago

5 0

The Answer is b I hope that is right

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A student researcher compares the heights of men and women from the student body of a certain college in order to estimate the d

maria [59]

Answer:

(0.6613, 8.3387)

Step-by-step explanation:

Let the heights of men be the first population and the heights of women be the second population. Then

We have $n_{1} = 15$ , $\bar{x}_{1} = 69.4$ , $s_{1} = 3.09$ and

$n_{2} = 7$ , $\bar{x}_{2} = 64.9$ , $s_{2} = 2.58$ . The pooled

estimate is given by

$s_{p}^{2} = \frac{(n_{1}-1)s_{1}^{2}+(n_{2}-1)s_{2}^{2}}{n_{1}+n_{2}-2} = \frac{(15-1)(3.09)^{2}+(7-1)(2.58)^{2}}{15+7-2} = 8.68$

The 99% confidence interval for the true mean difference between the mean height of the men and the mean height of the women is given by (if the samples are independent)

$(\bar{x}_{1}-\bar{x}_{2})\pm t_{0.01/2}s_{p}\sqrt{\frac{1}{15}+\frac{1}{7}}$ , i.e.,

$(69.4-64.9)\pm t_{0.005}2.946\sqrt{\frac{1}{15}+\frac{1}{7}}$

where $t_{0.005}$ is the 0.5th quantile of the t distribution with (15+7-2) = 20 degrees of freedom. So

$4.5\pm(-2.845)(2.946)(0.458)$ , i.e.,

(0.6613, 8.3387)

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3 years ago

Mari has a part time job. She earns $7 an hour. She makes at most $143.50 a week. What is the greatest number of hours that she

Readme [11.4K]

591.928571 is your answer

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3 years ago

In this picture, m<4=m<5=

djverab [1.8K]

Answer:

In the picture above.

Step-by-step explanation:

Using some identities for solution

I hope that it's a clear solution.

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3 years ago

En una nevería, si deseas consumir algún paquete de snacks tiene un costo de $30 y no te cobran la admisión. Si consideras x a l

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Answer:

goihgtf hhhiittr edfyji hrtioomg trion.

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2 years ago

What is the driving time for a 1700 miles trip if you Drive an average speed of 53 mph

slavikrds [6]

Answer:

32.08h

Step-by-step explanation:

1700/53= 32.08h is the time

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3 years ago