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lesya692 [45]
3 years ago
5

The Sport Journal (Winter 2004) reported on a study of a speed-training program for high school football players. Each participa

nt was timed in a 40-yard sprint both before and after training. The researchers measured two variables: (1) the difference between the before and after sprint times (in seconds), and (2) the category of improvement ("improved," "no change," and "worse") for each player. What is the type for the variable "improvement"?
A. Ordinal
B. Interval
C. Ratio
D. Nominal
Mathematics
1 answer:
ruslelena [56]3 years ago
7 0

Answer:

Ordinal

Step-by-step explanation:

The definition of ordinal type of variables states that "if the variable has meaningful ordering or the data values of variable can be arranged in ranking then the variable is ordinal"

Here are some examples of ordinal variable to have a clear idea about it.

i) Ratings of product i.e. Excellent,good,fair, worse.

ii) Grades in exam i.e. A,B,C,D and F.

iii) Ranks in army.

iv) Ranks in sports team.

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Find the exact value of sin^-1(-√3/2)
Lana71 [14]

Answer:

  -60°

Step-by-step explanation:

Your calculator and/or your knowledge of trig function values can find this for you.

The arcsine function has a range of -90° to +90°. Positive angles 240° and 300° will also have the sine value -√3/2.

  arcsin(-√3/2) = -60° = -π/3 radians

4 0
3 years ago
What is the answer to this question?
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What math are you in?

6 0
3 years ago
Help please and thanks first will get brainlest
4vir4ik [10]
The answer is 3000 L
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4 years ago
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25.What is the average rate of change for the sequence shown?
d1i1m1o1n [39]

Given the following points:

(1, 4): (2, 2.5): (3, 1) and (4, -0.5).

We are asked to find the average rate of change of the sequence.

The average rate of change for the sequence is the slope and it can be solved using the slope formula.

Slope (m) = y2 - y1

x2 - x1

So, lets choose two points on the line and substitute into the formular.

(1, 4) and (2, 2.5)

where:

x1 = 1

x2 = 2

y1 = 4

y2 = 2.5

m = 2.5 - 4

2 - 1

m = -1.5/1

m = -1.5

m = -1 1/2

Therefore, the correct option is the second option.

8 0
1 year ago
Expand 3(4x +2) please i just need the answer
lara31 [8.8K]

Answer:

12x + 6 =0

12x = -6

x = -6/12 = -1/2 = -0.5

6 0
3 years ago
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