All categories

3 years ago

Fifteen out of 60 participants scored between 17 and 21 on a test. what is the relative frequency of the class interval 17-21?

2 answers:

8 0

The <u>correct answer</u> is:

1/4, or 25%.

Explanation:

The relative frequency is the fraction of times something occurs compared to the total.

In this problem, 15 out of 60 participants are in this range. This is written as:
15/60.

This will then simplify:
15/60 = 1/4 = 0.25 = 25%

musickatia [10]3 years ago

4 0

The frequency is how often something occurs. Here 15. It occurred 15 times that the participants scored in the interval given.

The relative frequency (expressed as a percent) looks at how often something occurred relative to the overall occurrences. Here 15/60 = 1/4 = 25%

The relative frequency is 25%

You might be interested in

How to convert 5x^2-60x+200 to vertex form?

Rom4ik [11]

Y=a(x-h)^2+k

is what vertex form look like. (h,k) is your vertex so in this problem your vertex would be (60,200)

6 0

3 years ago

If the perimeter of a square garden is 84 feet, what is the area of the garden?

EastWind [94]

441ft² (i believe this is the answer, idk though, i might be wrong sorry)

6 0

4 years ago

Read 2 more answers

Is the answer a, b, c, or d.

ale4655 [162]

The correct answer is d.

We have the following system of linear equations:

(I) $4x+7y=-14$
(II) $8x+5y=8$

Let's use the elimination method, then let's multiply the equation (1) $\times(-2)$ and subtracting (I) and (II):

(I) $-2(4x+7y)=-2(-14)$
∴ $-8x-14y=28$

(I) $-8x-14y=28$
(II) $8x+5y=8$
____________________
(III) $-9y=36$

∴ $y=-4$

We can find the value of x by substituting y either in (I) or (II). Thus, from (I):

$4x+7(-4)=-14$
∴ $4x-28=-14$
∴ $4x=14$
∴ $x=\frac{14}{4}$
∴ $\boxed{x=\frac{7}{2}}$

Let's substitute the values of x and y into (I) and (2)

(I) $4(\frac{7}{2})+7(-4)=14-28=-14$
(II) $8(\frac{7}{2})+5(-4)=28-20=8$

Finally the answer is:

$\boxed{x=\frac{7}{2} \rightarrow x= 3 \frac{1}{2}}$

4 0

3 years ago

A train ticket was £4.50. The price then increased by 3%. What price is the train ticket now

mihalych1998 [28]

0.14 pounds (rounded; 0.135 unrounded); To calculate the % of something, divide it by 100 and multiply the result by the percentage you want to find.

0.0450 (=1%)

0.0450 x 3 = 0.135

8 0

3 years ago

When multiplied by itself, which number is equal to 12,345,678,987,654,321?

adelina 88 [10]

5 0

3 years ago