Answer:
(c)approximately Normal, mean 112, standard deviation 1.414.
Step-by-step explanation:
To solve this problem, we have to understand the Central Limit Theorem
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a random variable X, with mean 
and standard deviation 
, a large sample size can be approximated to a normal distribution with mean and standard deviation 
.
In this problem, we have that:
Using the Central Limit Theorem
The distribution of the sample mean IQ is approximately Normal.
With mean 112
With standard deviation 
So the correct answer is:
(c)approximately Normal, mean 112, standard deviation 1.414.
Answer:
(D)
Step-by-step explanation:
First, you have to graph the equation. Then you notice that it is a parabola facing downwards. This means that as the graph decreases on the left side, the x's become negative and the y's become negative. On the right side, the x's become positive and the y's become negative.
Answer:
-3 and 1
Step-by-step explanation:
The zero(root, range) of a parabola is where the parabola touches the x axis, here you can see that the parabola touches 1 and -3 on the x axis, hence that is the root.
First, figure out its slope. that is (4-2)/(2-1)=2
then, write its point-slope form:
y-(-3)=2(x-2)
45 = 1, 3, 5, 9, 15, 45
85 = 1, 5, 17, 85
90 = 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
So, greatest common factor is 5
