Question

Alejandra measures the mass of a cup of baking soda three times. Her measurements all exactly reflect the actual mass of the baking soda.

If each measurement in a set of data has a high level of accuracy, this indicates

that the precision of the data set cannot be evaluated.

nothing about the level of precision of the data set.

that the data set also has a high level of precision.

that the data set has a very low level of precision.

Answer 1

Ale-ale-jandra ale-ale-jandra

Answer 2

Sorry, too much math is making me sort of crazy

Answer 3

lol Lady GaGa

Answer 4

@bookworm00981 thnx

Answer 5

ok need help on this one lol

Answer 6

I'm not totally sure either. I have a guess but that's all it is.

Answer 7

lol ok

Answer 8

@Directrix

Answer 9

I think that because measurements being close to each other to a high number of significant digits is implied when the measurements are also all close to the exact value, then you are going to have precision when you have accuracy. But I'm not going to say anything certain.

Answer 10

ok whts your guess

Answer 11

I just told you my guess. :)

Answer 12

lol oh

Answer 13

"Accuracy is the level of closeness between a measured quantity and the actual or standard value. Precision is the level of closeness between multiple measurements of the same quantity."

"If a set of data is highly accurate, then all of the measurements are very close to the actual value. Since the data points are all close to the actual value, they will also be very close to one another, indicating that the data set also has a high level of precision."

http://tinyurl.com/lgxgtms

Answer 14

I guessed right. :D
Thanks @Directrix

Answer 15

Which option did you guess? @SACAPUNTAS

Answer 16

My guess is up there in paragraph form.
(This isn't my question so I didn't want to just give the answer. :D )

Answer 17

Well, with which option is your conjecture compatible?

Answer 18

@SACAPUNTAS Is it this: that the precision of the data set cannot be evaluated.

Answer 19

No. It's that the level of precision is also high.

Answer 20

@SACAPUNTAS But, the question does not refer directly to the baking soda scenario.

Look at it again, "If each measurement in a set of data has a high level of accuracy,.."

In a set of data is not necessarily in the baking soda set of data, is it?

Answer 21

No, it doesn't.
But now I'm confused as to what you're saying. :P

Answer 22

im completely confused so wht were both of you alls answer choices because mine is D

Answer 23

nevermind i understand

Answer 24

Mine is C. And that quote @Directrix pasted suggested C, also. At least from the way I read it. Because of the whole "If a set of data is highly accurate, then all of the measurements are very close to the actual value. Since the data points are all close to the actual value, they will also be very close to one another, indicating that the data set also has a high level of precision" thing.

But if that's wrong... I don't know then!

Answer 25

It says if each measurement has a high degree of accuracy then... it should have high precision too. Because of that. I think.

Answer 26

y ai got it the answer is C as well

Answer 27

Ok good! Then I did guess right. :P

Answer 28

lol ya

Answer 29

Mine is A.