I need the answer ASAP

I need help on this. I've no idea about this. Please help me...

Mashcka [7]

Answer:

Answers are below.

Step-by-step explanation:

Hope this helps:)

4 0

1 year ago

Dora calculated the mean absolute deviation for the data set 35, 16, 23, 42, and 19. Her work is shown below.

Crazy boy [7]

Answer:

The calculation in step 3 is wrong

Step-by-step explanation:

1) The mean of a dataset is given by the sum of the values of the dataset divided by the number of values.

In this problem, the dataset is

35, 16, 23, 42, 19

And the number of data is

N = 5

So the mean is

$\bar x=\frac{35+16+23+42+19}{5}=27$

So, step 1 is correct.

2)

The absolute deviation of a value in the dataset is the absolute value of its difference from the mean value:

$\sigma_i = |x_i-\bar x|$

Since here the mean value is

$\bar x=27$

Then for each of the values in this dataset, we have:

$\sigma_{1}=|35-27|=8\\\sigma_{2}=|16-27|=11\\\sigma_{3}=|23-27|=4\\\sigma_{4}=|42-27|=15\\\sigma_{5}=|19-27|=8$

So calculations in step 2 are also correct.

3)

The mean absolute deviation is given by the sum of the absolute deviations for each data divided by the number of values in the dataset.

Therefore in this problem, it is:

$\bar \sigma = \frac{\sum \sigma_i}{N}=\frac{8+11+4+15+8}{5}=9.2$

While the result reported by Dora is 9.5: therefore, this step is not correct.

5 0

2 years ago

Read 2 more answers

15% of what number is 9?

Sholpan [36]

Answer:

x=60

Step-by-step explanation:

We have, 15% × x = 9

or,

15

100

× x = 9

Multiplying both sides by 100 and dividing both sides by 15,

we have x = 9 ×

100

15

x = 60

If you are using a calculator, simply enter 9×100÷15, which will give you the answer.

5 0

2 years ago

Please help quickly! <br><br> What is the measure of Arc CB. How did you determine this?

S_A_V [24]

Answer:

As shown in picture,

Angle CDF = Angle BDE = 54 deg (pair of opposite angles)

Angle CDB = 180 - CDF = 180 - 54 = 126 deg (BF is a diameter).

=> Arc CB = Angle CDB = 126 deg (property of angle on circle)

Hope this helps!

:)

4 0

2 years ago

Will bought a new skateboard that was on sale. The original price of the skateboard was $60. The store had marked it down by 20

AlexFokin [52]

We conclude that after the discount and the coupon, Will paid $36 for the skateboard.

<h3>How much did Will pay for the skateboard?</h3>

We know that the original price was $60, and two discounts were applied. One of 20% and other of 25%.

Then the amount that he paid is given by:

P = $60*(1 - 20%/100%)*(1 - 25%/100%)

P = $60*(0.8)*(0.75) = $36

We conclude that after the discount and the coupon, Will paid $36 for the skateboard.

If you want to learn more about discounts:

brainly.com/question/843074

#SPJ1

3 0

1 year ago