cutebab6723
20.03.2020 •
Mathematics
A group of students at a school takes a history test. The distribution is normal with a mean of 25, and a standard deviation of 4. (a)Everyone who scores in the top 30% of the distribution gets a certificate. What is the lowest score someone can get and still earn a certificate?
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Ответ:
27.1
Step-by-step explanation:
Given:
mean=25
standard deviation=4
z0.70=0.525
z*sd = x-mean= 2.1
the lowest score for the top 30%: x=27.1
Ответ:
answer:
d
step-by-step explanation: