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2 years ago

How do i answer this question?

Mathematics

1 answer:

igomit [66]2 years ago

8 0

Answer:

its a=bh

Step-by-step explanation:

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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)

5 0

3 years ago

Graph the system of equations. Then determine whether the system has no solution, one solution, or infinitely many solutions. If

AVprozaik [17]

Answer:

It has one solution (1,0)

Step-by-step explanation:

y = -2x + 2

y = 4x -4

Substitute the y's

4x - 4 = -2x + 2

Let's move the variables to one side

4x - 4 = -2x + 2

+2x +2x

6x - 4 = 2

Lets move the constant to the other side

6x - 4 = 2

+4 +4

6x = 6

Divide both sides by 6

6x/6 = 6/6

x = 1

Let go back to y = -2x + 2

Substitute the x with 1

y = -2(1) + 2

y = -2 + 2

y = 0

6 0

3 years ago

53x – 4 = 30 O 10/3 O 40/3 40 10

Alekssandra [29.7K]

Answer:

53x - 4 = 30

53x = 30 +4

53x = 34

x= 34/53

I don't see a answer that matches the answer to the problem that you stated. Check problem.

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

6. Write and solve a system of THREE Inequalities that models the situation below.

yuradex [85]

Answer: uh.. 3?

Step-by-step explanation:

lol

7 0

2 years ago

Find the value of x in each triangle

mrs_skeptik [129]

Answer:

90°

Step-by-step explanation:

x + 37 + 53 = 180 (ANGLE SUM PROPERTY)

x + 90 = 180

x = 180-90

x = 90°

7 0

3 years ago

How do i answer this question?​

How do i answer this question?