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2 years ago

Can someone help me with both of these

Mathematics

1 answer:

telo118 [61]2 years ago

3 0

Answer:

shrek

Step-by-step explanation:

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If there are 7,674,000,000 people in the world and 80,000 of them have a Reh, what is the probability at least one person has a

9966 [12]

Answer:

its not 80k/3000 someone answer

Step-by-step explanation:

3 0

3 years ago

Which numbers are divisible by 9

tankabanditka [31]

<span>A number is divisible by 9, if the sum is a multiple of 9 or if the sum of its digits is divisible by 9.

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7 0

3 years ago

Read 2 more answers

What is the answer to 1/4 + 3/4

Alex73 [517]

Answer:

the answer is 1 or 4/4

Step-by-step explanation:

1/4 + 3/4 = 1 or 4/4

5 0

2 years ago

Read 2 more answers

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

Given that angle a = 54° and angle b = 48°, work out 3.

natima [27]

9514 1404 393

Answer:

x = 78°

Step-by-step explanation:

The sum of the interior angles of a triangle is 180°.

x + a + b = 180°

x = 180° -a -b . . . . . . . . add -a-b to both sides

x = 180° -54° -48°

x = 78°

7 0

3 years ago