PLS FAST, WILL GIVE BRANLIEST IF ANSWER

The data (1.5.8.5.1) represent a random sample of the number of days absent from school for five students at Monta Vista High. F

lianna [129]

Answer:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

Step-by-step explanation:

For this case we have the following data given:

1,5,8,5,1

We can find the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

And for the deviation (assuming that the correct approximation is the deviation for a population) we can calculate the deviation with the following formula:

$\sigma = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And replacing we got:

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

3 0

4 years ago

The sum of the measures of three

Iteru [2.4K]

Answer:

A

Step-by-step explanation:

Equation

2x + 3x + 8 + 7x - 2 = 90

Solution

Combine like terms on the left

12x + 6 = 90 Subtract 6 on both sides

12x = 90 - 6

12x = 84 Divide by 12

x = 84/12

x = 7

8 0

3 years ago

PLEASE HELP ME!!!!! take a look at the question please

timurjin [86]

according to clue no. 1 the number is 760 > x > 740. so, it could be any number between 740 - 760.

according to the 2 & 3 clue we can conclude that thousandths and ones digit are even and thousandth digit is twice the ones digit.

so the ones digit could be, 2 & 4 and the thousandth digit could be 4 & 8.

according to the 4th clue we can say that the tenths digit is 1 and thousandths digit is 4 as, thousandth digit is the 2nd even number after ones digit and also, sum of tenths and thousandth digit is 5 so, 1 + 4 = 5.

so, through this we can conclude that,

• ones digit = 2 as ( thousandth is twice the ones = 2 × 2 = 4 )

• tenths digit = 1 ( as 1 + 4 = 5 )

• thousandths digit = 4 ( as 4 + 1 = 5 )

according to clue no. 5 product of hundredths and hundreds is 7 so, 7 × 1 = 7.

so, according to this we can conclude that hundreds digit is 7 because in the required number the hundreds digit is itself 7

• hundreds digit = 7

&

• hundredths digit is = 1

and also, tens digit is 5 because only ones and thousandths digit are even.

so, the required number is, 752.114

hope this answer helps you dear & may u have a great day ahead!... take care!

5 0

3 years ago

Describe and correct the error in the solution. (Be specific and explain as

sweet [91]

The error occurred in step 2. You have to use the distributive property for the parenthesis. It is supposed to be 5p+15.

The correct solution is p>-13.

6 0

4 years ago

Please help meee and explain specifically!!

vfiekz [6]

An isosceles triangle is when 2 angles are the same measure. an triangles angle equal to 180 degrees. therefore angle A is 80 degrees as well as angle B equals 80 degrees. since the angles of a triangle equal to 180 you subtract the two known angles to find angle C. So 180-80-80 which equals to 20.

Therefore angle C=20 degrees

6 0

3 years ago