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The following data give the prices of seven textbooks randomly selected from a university bookstore. $93 $173 $107 $125 $56 $163

Ne4ueva [31]

Answer:

Mean = $123

Standard deviation = 10190

Variance = 1698

Step-by-step explanation:

Mean=?

= sum of all numbers/ Total numbers

a = 93+173+107+125+56+163+144 / 7 = 861/7 = $123

Standard deviation=?

we know that = Sqareroot [ Sum (y)²] / N

we need deviation:

= x-a = y ; y²

= 93-123 = -30 ; 900

=173-123 = 50 ; 2500

=107-123 = -16 ; 256

=125-123 = 2 ; 4

=56-123 = -67 ; 4489

=163-123 = 40 ; 1600

=144-123 = 21 ; 441

Sum of y² = 10190.

= Square root [ 10190 / 7 ]

= 38.1

Variance = ?

= Sum ( y)² / N-1

= 10190 / ( 7-1)

= 10190 /6

= 1698

3 0

4 years ago

36% is equivalent to what fraction in reduced terms?

ANEK [815]

Answer: 9/25

Step-by-step explanation: 36% is equal to 0.36 which is 36/100 which can be reduced to 9/25

6 0

3 years ago

Read 2 more answers

A truck uses 1 gallon of diesel for every 12 miles traveled. The amount of diesel left in the gas tank, r gallons, after traveli

Snezhnost [94]

The question has missing details. However, general questions that could be asked is as follows:

(1) The number of miles traveled after using (say) 5 gallons

(2) The number of gallons used after traveling for (say) 36 miles

Answer:

See Explanation

Step-by-step explanation:

Given

$s = 120 - 12r$

A linear equation is represented as:

$y = c + mx$

Where

$c =y\ intercept$ and

$m = slope.$

c, in this question represents the initial capacity of the tank.

So, the initial capacity is 120 liters

Solving (a): r = 5

$s = 120 - 12r$

$s = 120 - 12 * 5$

$s = 120 - 60$

$s = 60$

60 miles traveled

Solving (b): s = 36

$s = 120 - 12r$

$36 = 120 - 2r$

Collect like terms

$2r =120 -36$

$2r =84$

Solve for r

$r = 42$

42 gallons used

4 0

3 years ago

Hip A receives a distress signal from the southwest, and ship B receives a distress signal from the same vessel from the north.

Goshia [24]

Answer:

<h2>The vessel in distress is located in between vessels A and B</h2>

Step-by-step explanation:

To describe how we arrive at the answer, we are going to use the drawing i have attached to this response.

southwest of ship A is just a distance around the third quadrant (using the cardinal point) and it is below A

North of B is few distances ahead of ship B.

Please see the attached sketch

4 0

4 years ago

The mayor of renee's town chose 160 students from her school to attend a city debate. This amount is no more than 1/4 of the stu

azamat

The answer is d.
First you have to divide 160/ 1/4. So you would do 160/1 divided by 1/4. Because of keep, change and flip. (k.c.f) you would keep 160/1, change the division sign, then flip 1/4 to 4/1. Then you multiply 160/1*4/1. Then you would get 640. Hope this helped.

7 0

3 years ago