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3 years ago

6

Branliest to correct answer explain how you got your answer please

1 answer:

Nutka1998 [239]3 years ago

4 0

10.7%

possibility to get a blue marker : 4/15

possibility to get a green marker: 6/15

possibility to get a blue then a green: 24/225

= 10.666666%
= 10.7%

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Please answer the attachment with an answer, and tell me how to do it for brainliest, and 75 points.

lorasvet [3.4K]

1) find the mean,
   20+10+30+20+50+30+40+20/8= 27.5
2) Find the distance of each value from that mean
   20- 7.5
   10- 17.5
   30- 2.5
   20-7.5
   50- 22.5
   30- 2.5
   40- 12.5
   20- 7.5
3) Find the mean of those distances
   7.5+17.5+2.5+7.5+22.5+2.5+12.5+7.5/8=10

The Mean absolute deviation for this data set is 10.

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4 years ago

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3 years ago

2 to the second power times 20÷4+7×3 and -3-y when y= 1/2

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2² * 20 : 4 + 7 * 3
= 4 * 5 + 21
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3 years ago

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Can someone please MAKE ME 4 QUESTIONS 2 of the questions will be about Subtracting integers using fractions and the other 2 wil

bearhunter [10]

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8 0

3 years ago

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

4 0

3 years ago