in wine, so that the human nose can detect. The odor for sulfde (OMS) in trained
ID: 3362484 • Letter: I
Question
in wine, so that the human nose can detect. The odor for sulfde (OMS) in trained wine tasters is about 25 micrograms per liter of wine (pg/). The untrained noses of consumers may be less sensitive, however. Here are the DMS odor thresholds for 10 untrained students 31 31 42 38 21 34 3 31 20 23 (a) Assume that the standard devation of the odor threshold for untrared noses known to be -7 ai Briefy dscuss the other two "smple condbons., usrng a stemplot to venfy that the distribution is roughly symmetric with no outiers. (Enter your anawers from smalest to largest. Enter NONE in any unused answer blanks.) nterval for the mean OMS odor threshold among all students. (Round your answers to two decimal places.)Explanation / Answer
we shall answer this in R as shoen below
data <- c(31,31,42,38,21,34,32,31,20,23)
## stem leave plot
stem(data)
##
mean(data)
sd(data)
The results are
The decimal point is 1 digit(s) to the right of the |
2 | 013
2 |
3 | 11124
3 | 8
4 | 2
> ##
> mean(data)
[1] 30.3
> sd(data)
[1] 7.149981
we know that
CI is given as
mean +- z*sd/sqrt(n)
putting the values
30.3 +-1.96*7.14/sqrt(10) , please note that the z for 95% CI is 1.96 from the Z table
solving this for plus and minus sign we get
25.87 , 34.72
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