Below are the data collected from two random samples of 500 American adults on the number of hours they work per day (rounded to the nearest hour):
Ryan concludes that adults spend a mean of 8 hours working each day. Malia thinks the mean is 9 hours. Who is correctâ€”Ryan or Malia? Explain your answer in two or three sentences

- anonymous

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- anonymous

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- anonymous

step by step help plz

- anonymous

@Loser66 can you help me plz

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## More answers

- anonymous

40*500/8?

- anonymous

@Loser66 am i going in the right direction?

- Loser66

Honestly, I don't know. @jtvatsim

- Loser66

I hate stats!!

- anonymous

@Loser66 thanks for being honest. hope @jtvatsim can help

- jtvatsim

Hmm... looking at it...

- anonymous

@jtvatsim ok

- Loser66

@jtvatsim you get 100, right? which is not the answer the Asker wants, right?
By definition of mean values, it is 500/5 =100, But they interpret the problem on the way I don't get!!

- jtvatsim

I'm building an excel table right now to speed up the calculations... I'll let you know what I get. The question is phrased a little unclearly.

- Loser66

If we work with the hours of A and B, then mean is 100 which is not the answer for both Ryan and Maya
But if we work on the hours itself like (6+7+8+9+10)/ 5 =8
But it is .....so...... dumb to interpret the problem that way.hahaha..... I feel so dumb now.

- jtvatsim

I'm trying to wrap my head around it still, I'm thinking we need to multiply the hours by the number of people who worked those hours... Not sure... still thinking...

- Loser66

ok, let's get help. Let me tag my master. @oldrin.bataku

- anonymous

@Loser66 ok

- anonymous

can it be 6(60)+7(90)+8(145)+9(150)+10(55)

- Loser66

then? divided by what??

- Loser66

and why do you just pick sample A to work out? why not B?

- anonymous

starting from the top..just guessing

- jtvatsim

I actually like that line of thought. It seems reasonable... for the following reasons:

- jtvatsim

We are trying to figure out the "Average number of hours worked".
The best way to do this is to first determine the "Total number of hours worked" and then divide this by the number of people we have. This will give us the average number of hours worked for one person.

- jtvatsim

Now, Loser66 raises a good point. Do we calculated the average for each sample separately? Or should we combine them? I argue that we should combine them, but either way, it seems like you will get similar answers.

- anonymous

if we combined them we won't determined who is correct

- jtvatsim

Perhaps, I guess that is assuming that Ryan uses one sample and Malia uses the other. I feel that they are both looking at the same data. But since you have probably worked on other problems in the class, you might have a better feel for what the assignments ask for.

- jtvatsim

Either way, we can gather the data and then decide what we will do with it.

- jtvatsim

Sample A Data:
Total hours worked: 4050 hrs
Total people sampled: 500 people.
Sample B Data:
Total hours worked: 4055 hrs
Total people sampled: 500 people

- anonymous

they check the same data

- anonymous

8.1

- anonymous

which is both samples; I think the purpose of the question is that you might not be able to just add them all together as a single sample since there's no reason to believe the random samples are not correlated in some unseen way (through overlapping, sampling some of the same people)

- anonymous

@oldrin.bataku because both worked out to be 8.1 therefore Ryan is correct?

- Loser66

@steffie84 what is your grade? which course it is?

- anonymous

@Loser66 7th am doing virtual school

- Loser66

WWWWWWWWWWat?? 7th grade!! shame on me!!! I don't know how to solve the 7th grade problem. hehehe.....

- anonymous

@Loser66 haha no shame there

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