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annipuppi
 one year ago
Question involving zscores... I'm really confused
annipuppi
 one year ago
Question involving zscores... I'm really confused

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amistre64
 one year ago
Best ResponseYou've already chosen the best response.2oy thats alot of words ...

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2we have human xbar, and human S values .. do you know what those refer to?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2xbar is a sample mean S .... has to be defined in your material somewhere as well. what would you think it should tell us?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2standard deviation is my guess

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2now, there is a formula that should have been presented to you in your course ... it allows us to calcuate a zscore; given a random variable value for x, a sample mean of xbar, and a standard deviation.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2can you find that zscore formula?

annipuppi
 one year ago
Best ResponseYou've already chosen the best response.0z score= xmean/standard deviation

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2right so they give us the values, all we have to do is compute z for waists, what are our x, mean, and standard deviation?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2ok, so lets just subtract the means from the dolls; and then divide off the S doll: 75.0 56.5 72.0 mean:91.2 80.9 93.7  16.2 24.4 21.7 /S /4.8 /9.8 /6.8  z1 z2 z3

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2i agree with those values

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2so what can we consider; given a 95% : 5% ratio for normaility

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2do you recall your empirical rule for approximating with standard deviations?

annipuppi
 one year ago
Best ResponseYou've already chosen the best response.0Like I said the material isn't comprehensive at all but I know that 95% of the data falls within 2 standard deviations

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2that was what i was looking to see :) so anything less than z=2 falls outside the range of what is considered 'acceptable' or 'normal'. do we have any values for z that are less than 2?

annipuppi
 one year ago
Best ResponseYou've already chosen the best response.0all three values are less than 2

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2then we could argue that the dolls proportions exhibit measurements that are less than the acceptable threshold ... they are below the 'minimum' values for normality. right?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.2of course the wording; "the most different" might suggest that the 3 values are what they are looking to argue with. how you process this is highly subjective :)

annipuppi
 one year ago
Best ResponseYou've already chosen the best response.0That's what I figured they meant. Thank you! I actually understand it now!
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