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lesya692 [45]
2 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]2 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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Alexxx [7]

Answer:

The y intercept is 80 and the line of the best fit is -3/5

Step-by-step explanation:

5 0
3 years ago
What is the vertex form of y=-2x2+4x + 3?
sukhopar [10]

Answer:

y=-2(x-1)^2+5

Step-by-step explanation:

we have

y=-2x^2+4x+3

This is the equation of a vertical parabola open downward

The vertex represent a maximum

Convert the quadratic equation into vertex form

step 1

Factor -2

y=-2(x^2-2x)+3

step 2

Complete the square

y=-2(x^2-2x+1)+3+2

y=-2(x^2-2x+1)+5

step 3

Rewrite as perfect squares

y=-2(x-1)^2+5 ----> equation in vertex form

The vertex is the point (1,5)

3 0
3 years ago
A fair spinner has 9 equal sections: 2 red, 3 blue and 4 green.
elixir [45]
Probability of 2 consecutive greens equals 4/9*3/8=1/6
Probability of not getting equals 1-1/6=5/6
4 0
2 years ago
How u do dis ............
Norma-Jean [14]

i’ll try to help.

angle 3 and angle 1 are congruent angles, so they both equal 75°.

angle 1 and angle 5 are corresponding angles, so they both equal 75°. (it’s bc they’re positioned the same.

soooo the answer to that is 75° for angle 5. (not really great at explaining) also hope that the answer is right it should be.

5 0
3 years ago
Please help WILL GIVE BRAINLIEST! find the missing triangle measurements
dimaraw [331]

ABC=50

DCE=65

DEF= I think 115

I hope that helps I would appreciate brainliest if possible :)

5 0
2 years ago
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