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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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What is the midpoint of 2,6 and 10,12
-BARSIC- [3]

Answer:

               = 6, 9

Step-by-step explanation:

To find the midpoint , we use the formula

midpoint = (x1+x1)/2, (y1+y2)/2

             = (2+10)/2,  (6+12)/2

               = 12/2, 18/2

               = 6, 9

5 0
2 years ago
Read 2 more answers
What is the median of the data?<br><br> 11,16,12,7,23,9,5,5
Stells [14]

Answer:

5,5,7,*9,11,*12,16,23

Step-by-step explanation:

Since, the data has an even amount of numbers once, you put your numbers in order you place your pointer fingers from the 1st to last number & continue to move closer. There is an even amount of numbers so you would have to add the 2 numbers up & then divide them by 2.

9+11=20 divided by 2=10

6 0
3 years ago
Given f(x)=5-3x, if f(x)=-19, find x
Dafna1 [17]

X would equal 8

Step-by-step explanation:

5-3(8) = -19

5 multiplied by negative 3 times 8 equals negative 19

negative 3 times 8 equals negative 24 plus 5 equals 19

7 0
3 years ago
Which decimal is equivalent to 13 over 9
DaniilM [7]

i believe 1.44444444444

5 0
2 years ago
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What is Factor 64b-16c to identify the equivalent expressions.
liubo4ka [24]
Answer:
16(4b - c)

Explanation:
16 x 4b = 64b
16 x c = 16c
3 0
3 years ago
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