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3 years ago

Help me please!!!!!!

Mathematics

1 answer:

maks197457 [2]3 years ago

8 0

To find the median, find the middle number. Since there are 10 numbers, find the 5th one and the 6th one and find their average.

The two numbers are both 9, so its safe to say that the median is 9.

to find the median of the first and quartile, you have to place a line where the median should be and find the median of that. Q1 and Q2 will be 5 and 11 (respectively).

Its easy to see that all the lines start at the lowest point given and end at the largest point given, so match Q1, the median, and Q3

The only line that has lines at the Q1, median, and Q3 we figured out is answer C, so therefore it is the answer.

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NEED HELP ASAP PLZZZZZZZZZZ!!!!!!!!!!!!!!!!!!!!!

umka2103 [35]

Answer:

D 216 pizzas

Step-by-step explanation:

if there expecting 1,088 I would say that's 56 pizzas

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3 years ago

What do we mean when we say that a distribution is symmetric?

rusak2 [61]

Answer:

values of variables occur at regular frequencies and the mean , median and mode occur at the same point

Step-by-step explanation:

i found this on google sorry if it is a writing prompt so copy/paste if it is

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3 years ago

We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 21

katen-ka-za [31]

Answer:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

Step-by-step explanation:

Data given and notation

$n_A = 21$ represent the sampe size for A

$n_B =16$ represent the sample size for B

$s_A = 28.284$ represent the sample deviation for A

$s_B = 20$ represent the sample deviation for B

$\alpha$ represent the significance level provided

F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:

$F=\frac{s^2_1}{s^2_2}$

Solution to the problem

System of hypothesis

We want to test if we have the same variation, so the system of hypothesis are:

H0: $\sigma^2_A = \sigma^2_B$

H1: $\sigma^2_A \neq \sigma^2_B$

Calculate the statistic

Now we can calculate the statistic like this:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

8 0

4 years ago

Coach pug will train your dog for a membership fee of 45 dollar and a session fee of 20 dollars. Dr.Doberman will train your dog

N76 [4]

Answer:

Coach pug charges $45 only one time, and an additional of $20 per session.

So if you take x sessions, the total cost will be:

c(x) = $45 + $20*x

Dr. Doberman charges only $30 per session, then the cost for x sessions will be_

d(x) = $30*x

Now, which one is better for you?

We need to see the value of x such that:

d(x) = c(x)

$30*x = $45 + $20*x

$30*x - $20*x = $45

$10*x = $45

x = $45/$10 = 4.5

This means that if you take 4 sessions or less, is better the Dr. Doberman, because in this case we do not have an y-intercept.

If you want to have 5 sessions or more, is better Coach Pug, because the slope of the equation is smaller, so the costs for larger values of x will be smaller.

3 0

3 years ago

Please answer correctly !!!!! Will mark brainliest answer !!!!!!!!!!!!!!

Butoxors [25]

Answer:

Step 2.

Step-by-step explanation:

When you have a coefficient on a side of the equation that you need to get rid of, you must divide by the number. For example, in the problem:

3(x+8)² = 75

Here, you need to divide both sides by '3' instead of multiplying, which was done instead. Then you get:

(x+8)² = 25.

Therefore, his mistake was made at Step 2.

8 0

4 years ago