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How do you explain the characteristics of the F Distribution?
Characteristics of the F-distribution1. It is not symmetric. The F-distribution is skewed right. That is, it is positively skewed.2. The shape of the F-distribution depends upon the degrees of freedom in the numerator and denominator. This is similar to the distribution and Student's t-distribution, whose shape depends upon their degrees of freedom.3. The total area under the curve is 1.4. The values of F are always greater than or equal to zero. That is F distribution can not be negative.5. It is asymptotic. As the value of X increases, the F curve approaches the X axis but never touches it. This is similar to the behavior of normal probability distribution.
How does the mean affect the graph of a normal distribution?
It determines the location of the graph: left or right - but not its shape.
If the area to the left of x in a normal distribution is 0.123 what is the area to the right of X?
It is 0.877
What is the z score representing the 10th percentile of the standard normal distribution?
Right around -1.28
What is an example of a variable that is not normally distributed?
A variable that shows serious departure from the classic bell-shaped, or "Gaussian", curve is described as being not normally distributed. This departure could take the form of skew and/or kurtosis and/or multi modality.An example might be weekly wages. If you drew a histogram of a population's earnings you would most likely see a distribution skewed significantly toward the right. That is, toward the higher incomes.Another example is height. If you drew a histogram of a population's height you would see a bimodal distribution. One peak for males and another peak for females. The distribution of height for males and females might be normal when looked at individually, but not normal when you combine them.
What is the math shape when it looks like a bow?
It could be a Gaussian curve (Normal distribution) rotated through a right angle.It could be a Gaussian curve (Normal distribution) rotated through a right angle.It could be a Gaussian curve (Normal distribution) rotated through a right angle.It could be a Gaussian curve (Normal distribution) rotated through a right angle.
Can a normal distribution curve be symmetric or left-skewed or right-skewed?
Symmetric
Is the total area under a normal distribution curve to the right of the mean is always equal to 0?
100%
What is the z value such that 50 percent of the total area lies to the right of the curve in a normal distribution?
The Z value is 0.
When a population distribution is right skewed is the sampling distribution normal?
No, as you said it is right skewed.
Is the value of mean equals 35.4 and value of median equals 35 the shape of the curve skewed is?
the shape of the curve skewed is "right"
What happens to the graph of the normal curve as the mean increases?
The graph shifts to the right.
What is the probability associated with the area to the right of the mean in a normal distribution?
50%
Is it normal if your penis goes to the left when hard?
Yes. Although all do not curve left or right, a curve in one direction or the other when hard is very common (i.e. normal)
What is the sketch for a normal distribution?
The normal distribution is a bell shaped curve. Properly normalized, the area under the curve is 1.0. Start by drawing axes. The Y axis is probability, peaking at 0.4, crossing the X axis at the mean, and the X axis is standard deviation. Draw points (-3, 0.01), (-2, 0.05), (-1, 0.25), (0, 0.4), (+1, 0.25), (+2, 0.05), (+3, 0.01). These are all approximations. Connect the dots, understanding that the curve is asymptotic to the X axis.For a better picture, as well as an explanation, please see the related link below. This picture also shows you the percentage each area, grouped by standard deviation, or sigma, is. The normal distribution is the second picture on the right. Scroll up to see the picture, call "Normal Distribution".
Find the area under the standard normal curve to the right of z equals 1?
From the table in the related link, the value at z equal one is 0.3413. The area then to the right of z equal one is 0.5 - 0.3413, or 0.1587.
What does the phrase 'behind the curve' mean?
In a business sense, it usually means a new employee is not quite keeping up with the 'learning curve' required to perform a particular job. In other instances it would mean 'off the pace' or 'behind schedule'. The origin of the phrase refers to the statistical bell shaped curve also called the normal probability distribution; where to be 'behind the curve' is to be analogously in area of the graph to the left of the bell curve, to be 'ahead of the curve' analogously in the area of the graph to the right of the bell curve.
