Answer: A. Mean of sampling means 
Standard deviation of sampling means =
B. The probability that your sample has mean less than 165 is 0.1492 .
Given : The distribution of blood cholesterol level in the
population of young men aged 20 to 34 years is close to normal with
mean 
Mg/dl and standard deviation 
mg/dl.
Sample size : n= 150
Let 
sample mean values.
A. The mean and the standard deviation of the distribution of the sampling means would be :
Mean of sampling means =
Standard deviation of sampling means = 
The probability that your sample has mean less than 165 would be
Hence , the probability that your sample has mean less than 165 is 0.1492 .
There are ~39 inch in 1 meter
39 x 5 = 195
Michelle walked ~195 inch.
hope this helps
We can use similar triangle ratio to calculate x.
let one of the hypotenuse of the triangle on top be y.
12/x = y/2y (the ratio of the same sides of similar triangle is always equal)
then use cross method.
xy = 24y
x = 24
If a linear system has more unknown equations then it must have infinitely many solutions, which is true.
<h3>What is a linear equation?</h3>
A relationship between two or more parameters that, when shown on a graph, produces a linear model. The degree of the variable will be one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
If there is only one equation with more than one parameter, then the number of the solution will be infinite.
If a linear system has more unknown equations then it must have infinitely many solutions, which is true.
More about the linear equation link is given below.
brainly.com/question/11897796
#SPJ4
