Answer:
Options a, b, c are correct.
Step-by-step explanation:
First let's see the equation that governs the statement, which is the following:
![r = \frac{cov (x, y)}{\sqrt{var(x) var (y)} }](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7Bcov%20%28x%2C%20y%29%7D%7B%5Csqrt%7Bvar%28x%29%20var%20%28y%29%7D%20%7D)
Therefore, reading options a, b, c are correct.
Since from the formula we have the correlation coefficient of two variables x and y and here it shows us the correlation between x, y and y, x is the same.
This means that the 0.4 correlation implies a moderate but positive relationship between the two variables.
that is, the highest or lowest value of one variable implies a highest or lowest value of the other variable, respectively.
Answer:
When is at a significance level of 0.0001, the concentration of lead is above in water from Minnesota.
Step-by-step explanation:
The Significance level is the calculation or estimation of the strength of proof that must be seen in a sample, before the hypothesis will be rejected and concluded that the result is statistically true or correct.
In this case, when a data is calculated to be significant at 0.0001 from a recent duty, what the significance level implies in this case is that, at a level of 0.001, the concentration of lead is above or higher in water from Minnesota.
The answer to your question is 405, because look divide 324 by 4 becasue thats how many fifths are being used then multiply the answer which is 81 by 405
Answer:
55% percentage mark up
Step-by-step explanation:
Formula = Gross profit / Cost of item * 100 First we find the Cost of item = 39.99 / 06 = 66.65 as 66.65 * 0.60 = 39.99 then we find the Gross profit 66.65 - 29.99 = 36.66 then plug into the formula 36.66/66.65 * 100 =55.0037509% = 55%
<em><u>Question:</u></em>
Hector has a floor plan showing his new house. On the floor plan, his bedroom is 3 inches wide and 3 1/2 inches long. The scale of the floor plan is 1/4 inch = 1 foot. What is the actual length of Hector’s room?
<em><u>Answer:</u></em>
The actual length of Hector room is 14 foot
<em><u>Solution:</u></em>
Given that, On the floor plan, his bedroom is 3 inches wide and
inches long
<em><u>The scale of floor plan is given as:</u></em>
![\frac{1}{4} \text{ inch} = 1 \text{ foot }](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%20%5Ctext%7B%20inch%7D%20%3D%201%20%5Ctext%7B%20foot%20%7D)
Therefore,
![1 \text{ inch } = 4 \text{ foot}](https://tex.z-dn.net/?f=1%20%5Ctext%7B%20inch%20%7D%20%3D%204%20%5Ctext%7B%20foot%7D)
To find: Actual length of floor
From given question,
![length = 3\frac{1}{2} \text{ inches}](https://tex.z-dn.net/?f=length%20%3D%203%5Cfrac%7B1%7D%7B2%7D%20%5Ctext%7B%20inches%7D)
Converting the mixed fraction to improper fraction,
![length = \frac{2 \times 3 + 1}{2} = \frac{7}{2} \text{ inches }](https://tex.z-dn.net/?f=length%20%3D%20%5Cfrac%7B2%20%5Ctimes%203%20%2B%201%7D%7B2%7D%20%3D%20%5Cfrac%7B7%7D%7B2%7D%20%5Ctext%7B%20inches%20%7D)
Since, 1 inch = 4 foot
![\frac{7}{2} \text{ inches } = \frac{7}{2} \times 4 \text{ foot } = 14 \text{ foot }](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7D%20%5Ctext%7B%20inches%20%7D%20%3D%20%5Cfrac%7B7%7D%7B2%7D%20%5Ctimes%204%20%5Ctext%7B%20foot%20%7D%20%3D%2014%20%5Ctext%7B%20foot%20%7D)
Thus actual length of Hector room is 14 foot