I’m confused on this one

An insurance company collected data from a class of high school sophomores on whether or not they have a cell phone and whether

NeX [460]

Answer:

C. Those who have a car tend to have a cell phone.

Step-by-step explanation:

The relative frequency for a data set n is calculated by dividing each frequency $x_i$ by n.

We have a table that relates the use of cars and cell phones.

First, we take from the table the population that has a car.

$n = 18$

Then, of the students who have a car, 12 have a cell phone and 6 do not have a cell phone.

Then we calculate the relative frequencies $f_{x_i}$ for those who have a cell phone and those who do not.

______________________________________________

Relative frequency Students with car n = 18.

-------------------------------------------------- --------------------------------------

Cell phone No cell phone Total n

12/18 6/18 18

_______________________________________________

Relative frequency Students with car n = 18.

-------------------------------------------------- --------------------------------------

Cell phone No cell phone Total n

0.666 0.333 18

________________________________________________

Most students who have a car also have a cell phone.

Now we calculate the relative frequency for students who do not have a car.

_______________________________________________

Relative frequency Students without a car n = 7

-------------------------------------------------- --------------------------------------

Cell phone No cell phone Total n

2/7 5/7 7

_______________________________________________

Relative frequency Students without a car n = 7

-------------------------------------------------- --------------------------------------

Cell phone No cell phone Total n

0.286 0.714 7

_______________________________________________

Most students who do not have a car do not have a cell phone either.

Then these data suggest that. Those who have a car tend to have a cell phone.

Option C

6 0

3 years ago

Ms. Martin ordered new pom poms for her cheerleaders. She paid $157.94, which included 6% sales tax. How much were the pom poms

Tpy6a [65]

Answer:

$149.00

Step-by-step explanation:

Selling Price = Final Price / 1 + Sales Tax

(reverse tax calculator)

"For Example:

If your total receipt amount was $57.98, and you paid 1.07 percent in sales tax, you’d simply plug those numbers into our calculator to find out that your original price before tax was $57.37. From there, it is a simple subtraction problem to figure out that you paid .61 cents in sales tax."

5 0

3 years ago

Read 2 more answers

2 1 point

mafiozo [28]

Answer:

The graph has a minimum.
The graph has a y-intercept at (0, -3).
The solutions ... are -1 and 3.
The vertex is located at (1, -4).
In the equation, 'a' would be positive.

Step-by-step explanation:

When the graph has a low point, it has a minimum. 'a' is positive in that case. The coordinates of that low point are (1, -4). That point is the vertex.

The graph crosses the y-axis at y = -3, so the y-intercept is (0, -3).

The graph crosses the x-axis at (-1, 0) and (3, 0). These points represent the solution to the equation y = 0.

The graph has a minimum.
The graph has a y-intercept at (0, -3).
The solutions ... are -1 and 3.
The vertex is located at (1, -4).
In the equation, 'a' would be positive.

5 0

3 years ago

How many different squares appear in this picture?

ArbitrLikvidat [17]

Answer:

27

Step-by-step explanation:

4 times 4 is 16

2 boxes in the middle

4 tiny boxes in each one in the middle

1 entire one on the outside

1+4+4+2+16= 27

7 0

3 years ago

Hillgrove High School plays 3 soccer games. The team loses 2 of those games. According to the tree diagram, how many ways could

nikitadnepr [17]

It can go three ways, I hope this helped ^^

5 0

3 years ago

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