To the nearest tenth, which choice is the length of AC?

Describe the difference between the calculation of population standard deviation and that of sample standard deviation.

taurus [48]

Answer:

View graph

Step-by-step explanation:

The population refers to the whole set under study, while the sample is a representative part of that population.

3 0

3 years ago

Which expression is equivalent to 9^5

pochemuha

The expression that is equivalent to 9^5 is 3^2

5 0

4 years ago

The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random

Pavlova-9 [17]

Answer:

$m=\frac{27.75}{375}=0.074$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=\frac{150}{12}=12.5$

$\bar y= \frac{\sum y_i}{n}=\frac{28.5}{12}=2.375$

And we can find the intercept using this:

$b=\bar y -m \bar x=2.375-(0.074*12.5)=1.45$

So the line would be given by:

$y=0.074 x +1.45$

C. = 1.45 + 0.074x

Step-by-step explanation:

The data given is:

x: 5,5,510,10,10, 15,15,15, 20,20,20

y: 1.6,2.2,1.4, 1.9, 2.4,2.6, 2.3,2.7, 2.8,2.6, 2.9, 3.1

For this case we need to calculate the slope with the following formula:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

So we can find the sums like this:

$\sum_{i=1}^n x_i = 150$

$\sum_{i=1}^n y_i =28.5$

$\sum_{i=1}^n x^2_i =2250$

$\sum_{i=1}^n y^2_i =70.69$

$\sum_{i=1}^n x_i y_i =384$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=2250-\frac{150^2}{12}=375$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=384-\frac{150*28.5}{12}=27.75$

And the slope would be:

$m=\frac{27.75}{375}=0.074$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=\frac{150}{12}=12.5$

$\bar y= \frac{\sum y_i}{n}=\frac{28.5}{12}=2.375$

And we can find the intercept using this:

$b=\bar y -m \bar x=2.375-(0.074*12.5)=1.45$

So the line would be given by:

$y=0.074 x +1.45$

C. = 1.45 + 0.074x

8 0

3 years ago

Solve for W. W/7=g plz hurry

dangina [55]

Answer:

w = 7g

Step-by-step explanation:

Isolate the variable, w. Note the equal sign, what you do to one side, you do to the other.

Multiply 7 to both sides:

(w/7)7 = (g)7

w = 7g

w = 7g is your answer.

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5 0

4 years ago

There are 2 buildings, a and b. a had twice as many visitors as b. 2,950 went to a from b. now a has 39,500 more visitors than b

Sladkaya [172]

There are 100800 visitors there altogether in both the buildings.

Let the number of visitors in building b be x.

Visitors in building a will be = 2 x

Now, 2,950 went to a from b.

Visitors in building a = 2 x + 2950

Visitors in building b = x - 2950

ATQ: now a has 39,500 more visitors than b.

We get the equation as:

x - 2950 + 39500 = 2x + 2950

x + 36550 = 2x + 2950

2x - x = 36550 - 2950

x = 33600

2 x = 67200

Total visitors = x + 2x = 33600 + 67200

Total visitors = 100800

Therefore, there are 100800 visitors there altogether in both the buildings.

Learn more about equation here:

brainly.com/question/1214333

#SPJ4

3 0

2 years ago