Order these numbers from least to greatest-

Can someone please solve this problem for me. I'm kind of confused-<br>This is probability too-

Andrej [43]

Step-by-step explanation:

The probability of landing on the color gray ONCE

= 2/7

Since it is spun 35 times, the expected number of times that it lands on a gray will be

(2/7 × 35) = 10 times

The probability of landing on the color black ONCE

= 1/7

Since it is spun 105 times, the expected number of times that it lands on a black will be

(⅐ × 105) = 15 times

The formula is:

Expected value = (Number of spinning)×(probability of landing on a colour)

5 0

2 years ago

In the journal Knowledge Quest (January/February 2002), education professors at the University of Southern California investigat

Greeley [361]

Answer:

a,b) x represents the general attitude of these students toward recreational reading.

c) The 10th percentile of sample means is 102.51.

d) $P(x < 100) = 0.01390$

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by

$Z = \frac{X - \mu}{\sigma}$

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

In this case, we have that:

The mean score for this population of children was 106 points, with a standard deviation of 16.4 points, so $\mu = 106, \sigma = 16.4$ .

a,b) What is x?

x represent the mean recreational reading attitude score for the sample. So x represents the general attitude of these students toward recreational reading.

c) What sample mean would be the cutoff for the bottom 10% of sample means. (You are being asked for the 10th percentile of sample means.)

This is the value of X when Z has a pvalue of 0.10.

Looking at the Z table, that is $Z = -1.28$ .

We are working with the mean of the sample, so we have to find the standard deviation of the sample. That is

$s = \frac{\sigma}{\sqrt{n}} = \frac{16.4}{\sqrt{36}} = 2.73$

$Z = \frac{X - \mu}{\sigma}$

$-1.28 = \frac{X - 106}{2.73}$

$X - 106 = -1.28*2.73$

$X = 102.51$

The 10th percentile of sample means is 102.51.

d) Find P(x < 100).

This is the pvalue of Z when X = 100.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{100 - 106}{2.73}$

$Z = -2.20$

$Z = -2.20$ has a pvalue of 0.01390.

So $P(x < 100) = 0.01390$ .

6 0

3 years ago

Simplify<br> 4(5x^2-9x+7)+2(-10^2+18x-13)

Jlenok [28]

The answer is 20x^2 - 198

4 0

3 years ago

Read 2 more answers

The equation y + 6 = one-third (X minus 9) is written in point-slope form. What is the equation written in slope-intercept form?

stiks02 [169]

The equation written in slope-intercept form is y = (1/3)x -9

<h3>What is a linear Equation ?</h3>

A linear equation is that which can be represented in the form of y =mx +c , m is the slope and c is the intercept.

The given equation is

y+6 = 1/3(x-9)

To determine the slope and the intercept this equation needs to be solved

y+6 = (1/3)x - 3

y = (1/3)x -9

Therefore this is the slope intercept format , here

the slope = 1/3

intercept = -9

To know more about Linear Equation

brainly.com/question/11897796

#SPJ1

4 0

1 year ago

H

tigry1 [53]

Answer:

4448 feet²

Step-by-step explanation:

Using the formula $A = 2((l)x(w) + (l)x(h) + (w)x(h))$ we can take the length, width and height and plug them in. $A = 2(44x21 + 44x20 + 21x20)$ , solving this equation we get $4448 feet^{2}$ .

8 0

2 years ago