All categories

3 years ago

Need help now please

Mathematics

1 answer:

Marrrta [24]3 years ago

5 0

Answer:

all work is shown and pictured

You might be interested in

Does anyone know the answer to this algebra 2 question?

arlik [135]

ans is second one 4√20/2

4 0

4 years ago

Read 2 more answers

Complete each statement with a number that makes the statement true. Value of x that would make the statement on the left true

melomori [17]

Step-by-step explanation:

D. x>-2°C =

8 0

3 years ago

A simple random sample of size nequals81 is obtained from a population with mu equals 83 and sigma equals 27. (a) Describe the

Ivanshal [37]

Answer:

a) $\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

b) $z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

c) $z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

d) $z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

Step-by-step explanation:

For this case we know the following propoertis for the random variable X

$\mu = 83, \sigma = 27$

We select a sample size of n = 81

Part a

Since the sample size is large enough we can use the central limit distribution and the distribution for the sampel mean on this case would be:

$\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

Part b

We want this probability:

$P(\bar X>89)$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 89 we got:

$z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

Part c

$P(\bar X$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 75.65 we got:

$z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

Part d

We want this probability:

$P(79.4 < \bar X < 89.3)$

We find the z scores:

$z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

8 0

4 years ago

Por qué el aumento del nivel del mar

raketka [301]

Answer:

el aumento es debido a los icebergs derritiendose

losiento por mi español

4 0

3 years ago

....... ..............

olchik [2.2K]

Answer:

C. 4 and 5

Step-by-step explanation:

24 / 5 = 4.8

Option A is false since 4.8 is greater than both numbers.

Option B is also false because 4.8 is greater than both numbers.

Option C is true because 4 is less than 4.8 and 5 is greater than 4.8, making 4.8 lying between those numbers.

Best of Luck!

7 0

3 years ago