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ira [324]
3 years ago
7

The library of congress in Washington DC is considered the larger library in the world. They often receive boxes of books to be

added to their collection. Since books can be quite heavy, they aren’t shipped in big boxes. If, on average each box contains about 8 books how many books are received by the library in 6 boxes, 10 boxes or n boxes
Mathematics
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

6 boxes have 48 books

10 boxes have 80 books

n boxes have n×8 books

Step-by-step explanation:

if one box has 8 books then n no.of boxes will have n × 8 no.of books

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What representations are appropriate for comparing bite strength and weight of diffirent carnivores?
natta225 [31]

Answer:

Histogram

Step-by-step explanation:

Im pretty sure its a histogram because all other kinds of graphs wouldn't properly represent the data

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3 years ago
3 cylinders have a height of 8cm. Cylinder 1 has a radius of 1cm.Cylinder 2 has a radius of 2cm. Cylinder 3 has a radius of 3 cm
madam [21]
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3 years ago
Which of the following statements is true of the correlation analysis? The null hypothesis for the Pearson correlation coefficie
ASHA 777 [7]

Answer:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

Solution to the problem

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}

And is distributed with n-2 degreed of freedom. df=n-2=10-2=8

For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:

The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero

4 0
3 years ago
Given f(x)=1/4(5−x)2 what is the value of f(11)?
Readme [11.4K]

Answer:

-3

Step-by-step explanation:

Substitute the value of 11 into x within the function so it would be f(11) = 1/4(5-11)2 which is - 3.

8 0
2 years ago
Find the area of a circle whose radius is 3 1/2(three whole number one over two)
nasty-shy [4]

Answer:

38.5 in²

Step-by-step explanation:

Area of circle= πr², where r is the radius

Substitute the value of the radius into the formula above:

Area of circle

= π(3.5)²

= 12.25π

= 38.5 in² (3 s.f.)

7 0
3 years ago
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