Answer:
The correct option is (C).
Step-by-step explanation:
According to the Central Limit Theorem if we have n unknown population with mean <em>μ</em> and standard deviation <em>σ</em> and appropriately huge random samples (<em>n</em> > 30) are selected from the population with replacement, then the distribution of the sample means will be approximately normally distributed.
Then, the mean of the distribution of sample means is given by,
And the standard deviation of the distribution of sample means is given by,
The information provided is:
<em>μ</em> = 3.5
<em>σ</em> = 1.7078
<em>n</em> = 400 = number of times the experiment is repeated.
As the sample size is quite large, i.e. <em>n</em> = 400 > 30 the central limit theorem can be used to approximate the sampling distribution of the sample mean.
The mean of the distribution of sample means is:
The standard deviation of the distribution of sample mean is:
The distribution of the sample mean is:
.
Thus, the correct option is (C).
For this case we have the following equation:
We apply distributive property on the left side of the equation:
Subtracting from both sides of the equation:
Subtracting from both sides of the equation:
We multiply by 3 on both sides of the equation:
We multiply by -1 on both sides of the equation:
The solution of the equation is
ANswer:
I believe it is x=6 because 13-7=6
Answer:
d
Step-by-step explanation:
it's the only one that isn't a trend
Answer:
add all the sides together
a+b+c+d