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What proportion of a normal distribution is located in the tail beyond z-1.00?
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What proportion of a normal distribution is located between z equals -0.50 and z equals plus 0.50?
0.3829 approx.
When can a binomial situation be approxiamted with a normal distribution?
The binomial distribution can be approximated with a normal distribution when np > 5 and np(1-p) > 5 where p is the proportion (probability) of success of an event and n is the total number of independent trials.
What proportion are between 20 and 40 days old if there is Normal distribution with a mean of 28days and standard deviation of 8 days?
77.45%
Define a normal random variable?
I have included two links. A normal random variable is a random variable whose associated probability distribution is the normal probability distribution. By definition, a random variable has to have an associated distribution. The normal distribution (probability density function) is defined by a mathematical formula with a mean and standard deviation as parameters. The normal distribution is ofter called a bell-shaped curve, because of its symmetrical shape. It is not the only symmetrical distribution. The two links should provide more information beyond this simple definition.
What percentage of scores fall below 7 if the nmean is 8 and standard deviation 2?
Assuming a normal distribution, the proportion falling between the mean (of 8) and 7 with standard deviation 2 is: z = (7 - 8) / 2 = -0.5 → 0.1915 (from normal distribution tables) → less than 7 is 0.5 - 0.1915 = 0.3085 = 0.3085 x 100 % = 30.85 % (Note: the 0.5 in the second sum is because half (0.5) of a normal distribution is less than the mean, not because 7 is half a standard deviation away from the mean, and the tables give the proportion of the normal distribution between the mean and the number of standard deviations from the mean.)
What is the proportion of a normal distribution is located in the tail beyond a z score of z equals 1.00?
It is 0.158655, approx.
What proportion of a normal distribution is located in the tail beyond a z-score if z equals -1.50?
0.0668 or about 1/15
What proportion of subjects are considered outliers in a normal distribution?
There is no specific proportion: the answer depends on the level of significance beyond which subjects are considered to be outliers.
What proportion of a normal distribution is located between the mean and z-0.40?
0.15542174161
What proportion of a normal distribution is located between the mean and z 1.40?
0.419243340766
What proportion of a normal distribution is located in the tail beyond a z score of z equals 1.00?
It is 0.158655 or 0.159 approx.is the anwer 0.8413, -0.3413, -0.1587, 0.1587
What proportion of a normal distribution is located between z -1.50 and z1.50?
0.866
What proportion of a normal distribution is located between z = 1.00 and z = -1.00?
fggtfredrfttg
What percentage of a normal distribution is located in the tail beyond a z-score of z - 1.20?
11.51% of the distribution.
What percentage of a normal distribution is located in the tail beyond z equals 2.00?
2.27%
What percent of a normal distribution is located in the tail beyond z equals 2.00?
2.27
What proportion of a normal distribution is located between z -0.50 and z 0.50?
Prob(-0.5 < z < 0.5) = 0.3830
