- anonymous

A company offered one half of its employees a bonus if the production of gears increased by 50%. The other half of the employees was not offered a bonus. As the end of the month, production in the group that did not get the bonus offer increased by a mean of 20 and production in the bonus group increased by a mean of 40.
What is the correct order of steps to determine if the results are significant?
A: Calculate the probability of a difference of 20.
B: Randomly separate the employeesâ€™ individual results into two groups.
C: Calculate the mean of each group.
D: Calculate the differen

- jamiebookeater

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- anonymous

B, C, E, A, D
A, B, C, E, D
B, C, D, E, A
A, B, C, D, E

- anonymous

i think it's "A"

- anonymous

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## More answers

- anonymous

me to

- anonymous

- anonymous

thank you @MariahDimond

- anonymous

- anonymous

your welcome. :)

- anonymous

- anonymous

oh i forgot to post the step E

- anonymous

E: Run the experiment many times.

- anonymous

- anonymous

- anonymous

thank you for tagging these people for me @MariahDimond

- anonymous

lol np

- anonymous

- anonymous

thx

- Nnesha

why do think it's A ?

- anonymous

because the difference is calculated after running the experiment again, i think i'm not sure.

- anonymous

I posted the last order but in case you didn't see it.

- anonymous

What is the correct order of steps to determine if the results are significant?
A: Calculate the probability of a difference of 20.
B: Randomly separate the employeesâ€™ individual results into two groups.
C: Calculate the mean of each group.
D: Calculate the difference of the means.
E: Run the experiment many times.

- anonymous

B, C, E, A, D
A, B, C, E, D
B, C, D, E, A
A, B, C, D, E

- anonymous

A company offered one half of its employees a bonus if the production of gears increased by 50%. The other half of the employees was not offered a bonus. As the end of the month, production in the group that did not get the bonus offer increased by a mean of 20 and production in the bonus group increased by a mean of 40.

- Nnesha

aww i see thanks
http://prntscr.com/7gni3c

- Nnesha

makes sense
i guess you're right

- anonymous

thank you for your help , can you please help me with one more?

- Nnesha

*depends*

- Nnesha

word problem or trig ?

- anonymous

Bobby is testing the effectiveness of a new cough medication. There are 100 people with a cough in the study. Seventy patients received the cough medication, and 30 other patients did not receive treatment. Thirty-four of the patients who received the medication reported no cough at the end of the study. Twenty of the patients who did not receive medication reported no cough at the end of the study. What is the probability that a patient chosen at random from this study took the medication, given that they reported no cough?

- anonymous

63%
53%
38%
43%

- anonymous

sorry my internet turned off

- anonymous

- Nnesha

ahh still confusd abt first one

- anonymous

you think it's the fist choice?

- Nnesha

well first of all you have to divide into two groups

- Nnesha

so its either A or C

- anonymous

that's what i'm stuck at the answer is either a or c ! do you think i should choose "A"

- Nnesha

ahahha i'm not good at guessing
always stuck 't 2 option and 99% i pick the wrong one :P

- anonymous

it's ok , i'm going with "A" and see if it's right and i'll let you know if you want

- Nnesha

i guess by *difference * doesn't meant the difference before and after the experiment
difference = subtraction too :(

- Nnesha

alright GO_OD luck!

- anonymous

@Nnesha so you're saying A make sense?

- Nnesha

nope i'm just guessing :o why it can't be C ?

- Nnesha

alright just pick A
but it can be C ....

- anonymous

so it can be both?

- Nnesha

A or C one of them is right
:-)

- anonymous

can you please help me with the last question? i have already answered it

- anonymous

- Nnesha

well i'm not good at probability stuff sorry
@jim_thompson5910 100% he can help !

- anonymous

i hope so , thank you so much @Nnesha

- anonymous

but where are you from? @Nnesha

- jim_thompson5910

|dw:1434238989616:dw|

- jim_thompson5910

"There are 100 people with a cough in the study"
|dw:1434239146098:dw|

- jim_thompson5910

"Seventy patients received the cough medication"
"30 other patients did not receive treatment"
|dw:1434239184205:dw|

- jim_thompson5910

"Thirty-four of the patients who received the medication reported no cough at the end of the study"
so that leaves 70-34 = 36 people who did have a cough (who took the medicine)
|dw:1434239219354:dw|

- jim_thompson5910

"Twenty of the patients who did not receive medication reported no cough at the end of the study"
30-20 = 10 people had a cough. These people didn't take the medicine
|dw:1434239298161:dw|

- jim_thompson5910

compute the missing totals
|dw:1434239319010:dw|

- jim_thompson5910

"What is the probability that a patient chosen at random from this study took the medication, given that they reported no cough?"
so we circle just the "no cough" column since this is given to us. We don't even need to bother with the other columns
|dw:1434239381100:dw|

- jim_thompson5910

there are 34 people who took the medication (and had no cough) out of 54 people who had no cough
|dw:1434239483850:dw|
34/54 = 17/27
so P(took medicine|no cough) = 17/27

- anonymous

62.9 = 63%

- anonymous

- jim_thompson5910

yeah 17/27 = 63% roughly

- anonymous

would you please help me with two more. i would really appreciate it.

- jim_thompson5910

I'll help with one more. Post it as a new question so it doesn't clutter up this one

- anonymous

ok thank you.

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