Mathematics, 20.08.2020 21:01 heart80941
Which situation is an example of an observational study?
A. Dividing a class into thirds, giving each third a different amount of
time to read, and then testing comprehension
B. Collecting the blood pressure readings of a group of elderly
individuals in a small town
C. Testing the effectiveness of a mouthwash by allowing one group
to use it and comparing the results with those of a group that
doesn't use it
D. Having customers fill out a questionnaire about their favorite
brand of toothpaste
Answers: 2
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 17:30, astultz309459
Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression
Answers: 2
Mathematics, 21.06.2019 21:30, jstringe424
This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )
Answers: 3
Mathematics, 21.06.2019 22:10, BreadOfTheBear
Use the spider tool located on page 1 of this activity to draw a 12-pointed star for the new logo. (hint: if the spider rotates 360 degrees -- or 720 degrees or 1080 degrees -- she will be facing in the same direction in which she started. when the spider is done drawing, you want her to be facing in the same direction in which she started. she'll be making 12 rotations, all the same size, so each rotation must be some multiple of 360/12 = 30 degrees.) urgently. been stuck on this problem for around 45 minutes now.! it should be easy if you're smart enough
Answers: 3
You know the right answer?
Which situation is an example of an observational study?
A. Dividing a class into thirds, giving ea...
Questions in other subjects:
English, 05.12.2019 20:31
Mathematics, 05.12.2019 20:31
Biology, 05.12.2019 20:31
Biology, 05.12.2019 20:31
