Question

Someone check my answer please WILL MEDAL


Which situation is an observational study?

A testing the effectiveness of a new hair product by allowing one group to use it and compairing results against a group that doesnt use it.

B collecting the cholesterol readings of a group of people in a certain age group in a small town.

C calling a sample of registered voters before an election to find out what issues concern them most.

D finding out the number of monthly buglaries of a residential neighborhood for a statistical study for the police

i think its D

Answer 1

oooh stats lol im in that class:) lol anyway, its def not A, and C, because in A they are imposing a 'treatment' making it an experiment. I think it could be B or D but if you remember any other specifics to distinguish an observation from an experiment you should take a look at that:)

Answer 2

@Michele_Laino

Answer 3

@SolomonZelman

Answer 4

I had this question before

Answer 5

You are right it is D.

Answer 6

I think isC. The statistical study can be worked out using the binomial distribution.

Answer 7

Wrong, all of you are worong

Answer 8

why? @lovielove456767890

Answer 9

GOOGLE observational study it says that it is the study of treatments and its uses. A. is the answer because it tests the hair product

Answer 10

So is it d or not

Answer 11

No A. is the answer

Answer 12

Can you give me a medal

Answer 13

please @lovielove456767890 how do you work out the statistical study in case A?

Answer 14

Well, in A it testes how does the hair product works in two groups. In observational study it also testes how the product works in a group.

Answer 15

what statistical distribution are using, please?

Answer 16

what do you mean

Answer 17

please, note that there are, mainly, three statistical distribution, whichare used in order to make statistical predictions, namely:
1)Gaussian,
2)Binomial,
3)Poisson

Answer 18

Well I don't know which one. I am using my brain.

Answer 19

I have not learned about that stuff yet

Answer 20

I'm confused first you said it was d @lovielove456767890

Answer 21

I made a mistake. It is definately A.

Answer 22

what I wanted say, is this:
if we have two groups of ten persons, and the first group use the hair product, and the other groups don't use the hair product.
Furthermore within the first group only 6 over 10 can state the benefit of the hair product.
What can you conclude about the effectiveness of our hair product? @lovielove456767890

Answer 23

A. is the answer trust me, my bestie had it. i answered D. in my test got it wrong. But my bestie answered A. got it right. I was goanna put A. But my mouse was not so good so i PUt D by accident

Answer 24

under some hypothesis I think @lovielove456767890 is right!

Answer 25

in case A, we have to use the binomial statistical distribution, I think!