A particular fruit's weights are normally distributed, with a
mean of 334 grams and a standard deviation of 6 grams.
If you pick 36 fruits at random, then 13% of the time, their mean
weight will be greater than how many grams?
for normal distribution z score =(X-μ)/σx | |
mean μ= | 334 |
standard deviation σ= | 6 |
sample size =n= | 36 |
standard error=(σ/√n)*√(N-n)/(N-1))= | 6 |
for top 13% or 87th percentile critical value of z=1.13 | |
therefore corresponding value=mean+z*std deviation=335.13 grams |
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