anonymous
  • anonymous
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 correct—Ryan or Malia? Explain your answer in two or three sentences
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
step by step help plz
anonymous
  • anonymous
@Loser66 can you help me plz

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More answers

anonymous
  • anonymous
40*500/8?
anonymous
  • anonymous
@Loser66 am i going in the right direction?
Loser66
  • Loser66
Honestly, I don't know. @jtvatsim
Loser66
  • Loser66
I hate stats!!
anonymous
  • anonymous
@Loser66 thanks for being honest. hope @jtvatsim can help
jtvatsim
  • jtvatsim
Hmm... looking at it...
anonymous
  • anonymous
@jtvatsim ok
Loser66
  • 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
  • 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
  • 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
  • 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
  • Loser66
ok, let's get help. Let me tag my master. @oldrin.bataku
anonymous
  • anonymous
@Loser66 ok
anonymous
  • anonymous
can it be 6(60)+7(90)+8(145)+9(150)+10(55)
Loser66
  • Loser66
then? divided by what??
Loser66
  • Loser66
and why do you just pick sample A to work out? why not B?
anonymous
  • anonymous
starting from the top..just guessing
jtvatsim
  • jtvatsim
I actually like that line of thought. It seems reasonable... for the following reasons:
jtvatsim
  • 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
  • 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
  • anonymous
if we combined them we won't determined who is correct
jtvatsim
  • 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
  • jtvatsim
Either way, we can gather the data and then decide what we will do with it.
jtvatsim
  • 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
  • anonymous
they check the same data
anonymous
  • anonymous
8.1
anonymous
  • 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
  • anonymous
@oldrin.bataku because both worked out to be 8.1 therefore Ryan is correct?
Loser66
  • Loser66
@steffie84 what is your grade? which course it is?
anonymous
  • anonymous
@Loser66 7th am doing virtual school
Loser66
  • Loser66
WWWWWWWWWWat?? 7th grade!! shame on me!!! I don't know how to solve the 7th grade problem. hehehe.....
anonymous
  • anonymous
@Loser66 haha no shame there

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