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For a normal distribution find the z-scores values that separate the middle 60 percent of the distribution for the 40 percent in the tails?
Wiki User
∙ 11y ago
The standard normal table tells us the area under a normal curve to the left of a number z.
The tables usually give only the positive value since one can use symmetry to find the corresponding negative values.
The middle 60 percent leaves 20 percent on either side. So we want the z scores that correspond to that 80 percentile which is .804. Therefore the values are are between z scores of -.804 and .804
* * * * *
I make it -0.8416 to 0.8416
Wiki User
∙ 11y ago
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Describe the properties of a normal distribution?
A normal distribution is symmetric and when looked at on a graph, the graph looks like a bell shaped curve. Approximately 95 percent of its values should lie within two standard deviations of the mean. Frequency of the data lies mostly in the middle of the curve.
How does the median affect the graph of a normal distribution?
A normal distribution is symmetrical; the mean, median and mode are all the same, on the line of symmetry (middle) of the graph.
What is a skewed right?
A distribution or set of observations is said to be skewed right or positively skewed if it has a longer "tail" of numbers on the right. The mass of the distribution is more towards the left of the figure rather than the middle.
The distribution of the height of humans is a normal distribution. There are some very tall people and some very short people but most people are in the middle. What is mostly likely true about this?
Height is controlled by multiple alleles.
Why are mean median mode and range considered measures of central tendency?
Range is NOT a measure of central tendency. In a number of distribution - though by no means all - the mean, median and mode are near the middle of the distribution. That is more likely to be the case with a large number of observations (or experiments).
Is the middle spread that is the middle 50 percent of the normal distribution is equal to one standard deviation?
false
What are the z score boundaries for the middle of 50 percent of the distribution?
It is -0.6745 to 0.6745
What are the z score boundaries for the middle 60 percent of the distribution?
The boundaries are ± 0.8416
What are the z-score boundaries for the middle of 50 percent of the distribution?
50 * * * * * z = -0.67449 to z = +0.67449
What is the z-values associated with the middle 44 percent of the standard normal distribution?
-0.772 < Z < 0.772
What z score values form the boundaries for the middle 60 percent of a normal distribution?
z = - 0.8416 to z = + 0.8416
What is the middle 95 percent of students who drink five beers with a standard deviation of 01 and a mean of 07?
Not possible to tell you without knowing how many students' there are, and what distribution you wish to use (i.e normal distribution, t-distribution etc...)
What is the average percent weight distribution of human body if divided in three sections upper middle and lower sections that are equally divided in length?
upper body 40% middle body 40% lower body 20%
Percent in the Middle Ages?
percent of what???
What is the midpoint in the distribution of numbers?
The median is the "middle value"
What does analze means?
This is a statistic question regarding class Subjective Identification. listed are valid percents; lower class percent is 6.0, upper class percent is 3.5, working class percent is 42.0, middle class percent is 48.0. Will you describe the distribution, note the largest and smallest categories from the items as well as other interesting information
What is the distribution of main religions in the middle east?
The main religion distribution in Middle East is that Islam is the religion of majority there, then comes Christianity as the largest minority of Middle East and After that comes "Bahaism" as the 3rd largest religion of Middle East. http://www.datadubai.com/
