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amandasantiago2001
02.10.2020 •
Mathematics
Y = f(x) = 90
)-go(-) :
8
; x = 3, dx = ax = - 0.125
dy =
Solved
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Ответ:
sample size = 10
it is not practical because we can't draw a conclusion for a complete population based on the sample size of 10 people
Step-by-step explanation:
mean = 100
standard deviation = sigma = 10
confidence level = 99%
The z-score for 99% confidence level = z = 2.58
mean IQ is within 8 IQ points so:
error = E = 8
sample size = n (we don't know it)
Since the distribution is normal, we can use the formula of margin of error for z-distribution to calculate the missing sample size:
next integer rounded is 10