Continuous Distributions Flashcards
Uniform distributions have a area of
1
Unusual distributions have and area of
1
Normal distributions have a area of
1
To find the area of a trapezoid
1/2(b+b)(h)
To find the mean of a uniform distribution use the formula
A+B/2
To find the standard deviation of a uniform distribution use the formula
Square root(b-a)sq/12
To find the height of the uniform distribution you use
1 over the base of the rectangle
1/b
To find the z score use the equation
Z=x-mean/standard deviation
To solve for area of normal distribution use
Normal cdf
To solve for x in the normal distributions you use
Inverse norm
To find z score you do
Invers norm
Mean 0
Standard deviation 1
Density curves are used to describe what kind of random variables
Continuous
No matter what shape of a density curve, the are underneath it must be equal to
1
Density curves are symetrical all the time or some of the time
Some time
In what kind o distribution is the mean half is half sum of the two endponts of the distribution
Uniform
A density curve is always on it above the ——- axis
what axis
Horizontal axis
In a uniform distribution the mean is always larger or equal to the median
Equal to
Can the standard deviation be smaller than the mean
Yes
Having identical means and changing the standard deviation will get you different or same percentage
Same
I add means you
Add them
To add standard deviation you
Square add square root
To subtract means you
Subtract them
To subtract standard deviation you
Square add square root
