There are 8 new books and 6 used books on the shelf. A. What us the ratio of all books on the shelf to used books? B. What is th
1 answer:
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Answer:
The mean is 95 and the standard deviation is 2
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this question:
Population:
Mean 95, Standard deviation 12
Samples of size 36:
By the Central Limit Theorem,
Mean 95
Standard deviation
Answer:
= 12 or
= 12i
Step-by-step explanation:
You can't take squareroot of a negative number. It's not allowed!
But for positive 144 if that's what you're asking, it will be 12.
Hope this helps!