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aev [14]
3 years ago
15

Researchers wanted to determine if having a DVD player in the bedroom is associated with obesity. The researchers administered a

questionnaire to 363 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a DVD player in their bedroom was significantly higher than that of the adolescents who did not have a DVD player in their bedroom.Why is this an observational study? What type of observational study is this? Why is this an observational study?A. The researchers observed the behavior of the individuals in the study without trying to influence an explanatory variable of the study. B. The researchers tried to influence the outcome of the study. C. The researchers intentionally changed an explanatory variable of the study. D. The researchers administered a questionnaire to obtain their data without trying to influence an explanatory variable of the study.
Mathematics
1 answer:
Mashutka [201]3 years ago
3 0

Answer:

is c

Step-by-step explanation:

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Ashley has finished 7/25 of her homework what percentage of the homework does Ashley still need to finish
ludmilkaskok [199]

Answer:

72 percent

Step-by-step explanation:

7/25, x 4 to get a fraction of 100

28/100

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3 0
2 years ago
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Employee x earned $5250 in 3 weeks. at this rate how much will employee x earn in 8 weeks
iVinArrow [24]

Answer:

$14000

Step-by-step explanation:

Given parameters:

Amount earned by employee x  = $5250

Time duration  = 3weeks

Unknown:

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Solution:

Let us first find the rate of employee x earning;

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Insert parameters;

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So,

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      Amount earned  = rate x time duration

      Amount earned  =  $1750/week x 8weeks

      Amount earned  = $14000

8 0
2 years ago
5. What is the unknown number in Sequence 2 in the chart I an an
AlladinOne [14]
6×7=42 so the number missing is 42
4 0
3 years ago
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umka21 [38]
The answer is 3/2,-6
5 0
3 years ago
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Georgia [21]

Answer:

answer is 2

Step-by-step explanation:

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only one that only works out is 2        

               

6 0
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