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2 years ago

PLEASE PLEASE PLEASEEE! THIS IS DUE TOMORROW! ILL THANKS AND WHAT EVER ELSE I CAN TO WHOEVER GETS THIS!

Mathematics

1 answer:

sertanlavr [38]2 years ago

3 0

1.Y=-2/6 -5

2. >

3.<

4. False because the y intercept could be a positive or negative.

That's the best I got.

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I need help please.

Oduvanchick [21]

Answer:13/34

Step-by-step explanation:

6 0

3 years ago

The heights of men in the United States are approximately normally distributed with mean 69.1 inches and standard deviation 2.9

Gre4nikov [31]

Answer:

Step-by-step explanation:

Let M be the heights of men in the United States and W be the heights of women in the United States

Given that M is N(69.1, 2.9) and W (63.7, 2.7)

For a husband and wife we have average height as

$\frac{x+y}{2}$ =Z (say)

$Mean =E(z) = \frac{1}{2} [E(M)+E(W)] = 66.4 inches$

Var (Z) = $Var (\frac{x+y}{2} )=\frac{1}{4}[Var(x)+ Var(y)+2 cov (x,y)]\\$

= $0.25[2.9^2+2.7^2+2*r*sx*sy]\\= 0.25(20.398)\\=5.0995$

Mean = 66.4" and std dev = 2.258

7 0

3 years ago

I need help with weighted averages word problems on ixl

Alexxandr [17]

the question?

Step-by-step explanation:

8 0

3 years ago

According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Suppose data for th

mezya [45]

Solution :

Here, given :

Sample size, n = 39

Sample mean, $\bar X$ = 3.6

Standard deviation of the sample, s =2

The population mean, $\mu_0 = 3$

The significance level, $\alpha = 0.05$

a). Therefore the hypothesis is :

$H_0 : \mu = 3 \text{ Vs} \ H_a: \mu \neq 3$

b). The test statics is given as :

$t = \frac{\bar X - \mu_0}{\frac{s}{\sqrt n}} \rightarrow t_{n-1}$

$t = \frac{3.6-3}{\frac{2}{\sqrt {39}}}$

= 1.873

c). The p- value is given by :

$P(t_{d.f}>|t_{stat}|)$

$=P(t_{39-1}> 1.873)$

$=0.0688$

d). The conclusion :

In this case, the p-value is $0.688 > \alpha=0.05$

So, we do not reject $H_0$ .

Therefore, we conclude that it is not a statistically significant difference between national average time for selling a home and the mean time for selling in Greene County.

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3 years ago

Simplify 6e - 9 +10e

Anon25 [30]

Answer:

16e-9

Step-by-step explanation:

7 0

3 years ago