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djyliett [7]
2 years ago
10

An athletic coach conducted an experiment to test whether a four-week stretching and flexibility program reduces the number of m

uscular injuries that occur during athletic events. The coach randomly selected 30 athletes from several sports and randomly assigned 15 athletes to the four-week program. The remaining 15 athletes did not participate in any type of flexibility program during the four weeks.
Which statements about this study are true?

This study uses random sampling.
This study uses a control group.
This study uses a repeated measures design.
This study uses blocking.
This study uses blinding.

Mathematics
2 answers:
ohaa [14]2 years ago
8 0

Answer: it’s random sampling and control groups.

Step-by-step explanation: i got a 100% on my test :)

nirvana33 [79]2 years ago
5 0

Answer: This study uses a control group, this study uses repeated measures design, and this study uses random sampling

Step-by-step explanation:

You might be interested in
Use double angle formulas to find the exact value of sin2x,cos2x, and tan2x
denis-greek [22]
Sin2x = 2sinxcosx;
cos2x = (cosx)^2 - (sinx)^2;
tan2x = (sin2x)/(cos2x);

 cosx = 5/13 from formula (sinx)^2 + (cosx)^2 = 1;

=> sin2x = 120/169; 
.................................

5 0
2 years ago
Somebody please help!
Leona [35]
The answer would be 101

Steps:
2+8=10
10x10=100 (because of the exponent)
100+1=101
3 0
3 years ago
Here are 7 numbers.
SIZIF [17.4K]

Answer:

3.06

I hope this helps you :)

4 0
2 years ago
Here's the rest of my points for anyone who wants them :)
kramer

Answer:

7

Step-by-step explanation:

line in the middle is an angle bisector

14/6 = 21 / 3x - 12

first, cross multiply

14 (3x - 12) = 6*21

Remove the brackets

42x - 168 = 126

Add 168 to both sides

42x = 168 + 126

Combine

42x = 294

Divide by 42

x = 294/42

x = 7

chegg

brainly.com/question/16979551?utm_source=android&utm_medium=share&utm_campaign=question

3 0
1 year ago
Read 2 more answers
Sandra has developed a program designed to increase reading comprehension scores in 6th graders. She randomly selects three stud
Mandarinka [93]

Answer:a small sample size

Step-by-step explanation:

From the information given in the question, we are informed that Sandra developed a program that was designed to increase reading comprehension scores in 6th graders and she then randomly selects three students and has them participate in her program.

After comparing the mean score from the students who completed her program to three students who did not participate in the program, she finds no significant difference between their mean scores, it should be noted that the reason for this will be because the sample size is small.

If a large sample size was used, this could have been different as thsi could result in a significant difference between their mean scores.

8 0
3 years ago
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