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GarryVolchara [31]

2 years ago

15

Does any one understand number one ? And how do you do it ?

1 answer:

alexdok [17]2 years ago

6 0

Here are the answers for the HW:

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Evaluate 2y when y = 6

Alina [70]

$\bf \red{answer}$

When,

y=6

2y=2×6=12

4 0

3 years ago

10 times for thousands equals blank thousand equals blank

Marianna [84]

10×4,000=40,000 because all u do is add an extra zero everything you multiple something by ten

5 0

3 years ago

Consider the following hypothesis test. : : The following results are for two independent samples taken from two populations. Ex

I am Lyosha [343]

Answer:

$z = -1.53$ --- test statistic

$p = 0.1260$ --- p value

Conclusion: Fail to reject the null hypothesis.

Step-by-step explanation:

Given

$n_1 = 80$ $\bar x_1= 104$ $\sigma_1 = 8.4$

$n_2 = 70$ $\bar x_2 = 106$ $\sigma_2 = 7.6$

$H_o: \mu_1 - \mu_2 = 0$ --- Null hypothesis

$H_a: \mu_1 - \mu_2 \ne 0$ ---- Alternate hypothesis

$\alpha = 0.05$

Solving (a): The test statistic

This is calculated as:

$z = \frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\sigma_1^2}{n_1} + \frac{\sigma_2^2}{n_2} }}$

So, we have:

$z = \frac{104 - 106}{\sqrt{\frac{8.4^2}{80} + \frac{7.6^2}{70} }}$

$z = \frac{104 - 106}{\sqrt{\frac{70.56}{80} + \frac{57.76}{70}}}$

$z = \frac{-2}{\sqrt{0.8820 + 0.8251}}$

$z = \frac{-2}{\sqrt{1.7071}}$

$z = \frac{-2}{1.3066}$

$z = -1.53$

Solving (b): The p value

This is calculated as:

$p = 2 * P(Z < z)$

So, we have:

$p = 2 * P(Z < -1.53)$

Look up the z probability in the z score table. So, the expression becomes

$p = 2 * 0.0630$

$p = 0.1260$

Solving (c): With $\alpha = 0.05$ , what is the conclusion based on the p value

We have:

$\alpha = 0.05$

In (b), we have:

$p = 0.1260$

By comparison:

$p > \alpha$

i.e.

$0.1260 > 0.05$

So, we fail to reject the null hypothesis.

4 0

2 years ago

What single decimal multiplier would you use to decrease by 18% followed by a 19% increase?

g100num [7]

Answer:

26%

Step-by-step explanation:

You use to increase by 5% followed by 20% increase. Hence, the single decimal multiplier is 26%.

5 0

2 years ago

Please help I need this answer soon

Alexxx [7]

Answer:

Your answer is Option 4) $6.98

Step-by-step explanation:

let's see

kiran buys a meal that costs= $12

an additional amount has been added = 8.5%

= $12+8.5%= $13.02 or $13.2

so $13.2 - $20= $6.98

hope it helps please do give me brainliest :D

6 0

2 years ago