服从于以（1-α)即百分之k，的标准正态分布 我是这个专业的，呵呵。我们的专业英语里有的
The standard normal curve is a bell-shaped curve representing the probability of a normally distributed variable being less than or equal to the given value. The standard normal distribution has a mean of 0 and a standard deviation of 1. It's often called "the bell curve" or the "the uni...
Related to percentile:standard deviation per·cen·tile (pər-sĕn′tīl′)Statistics n. 1.Any of the groups that result when a frequency distribution is divided into 100 groups of equal size. 2.Any of the values that separate each of these groups. ...
The 90th percentile of the standard normal distribution is 1.645. True or False? Given that a normal distribution has a mean of 50 and a standard deviation of 5. The median is also 50. True or false and why? State True or False: Given that a normal distribution has a m...
What proportion of the scores are above the 75th percentile in a standard normal distribution? Given the following data, what is the 75th percentile? 36, 64, 18, 40, 35, 30, 41, 32 In a standardized test, the mean of the scores is 400 and the standard deviation of the scores is 100...
The conservativeness factors are calculated using the 25th or 75th percentile of the range generated by an uncertainty value for the gas and category, as appropriate, for use in an adjustment for the base year, or a year of the commitment period, assuming a log–normal distribution. 对稳妥性...
Tests for an Upper Percentile of a Lognormal Distribution Based on Samples with Multiple Detection Limits and Sample-Size Calculationdoi:10.1093/ANNHYG/MET037Krishnamoorthy, KalimuthuMathew, ThomasXu, ZhaoOxford University PressAnnals of Occupational Hygiene...
that determines exactly the population distribution, the percentiles can be computed exactly. More specifically, this calculator shows how to compute percentiles when the population mean (\(\mu\)) and standard deviation (\(\sigma\)) are known, and we know that the distribution is normal. ...
For example, in R, the functionpnorm()gives the percentile of an observation, given the mean and the standard deviation of the distribution. > pnorm(-1, mean =0, sd =1) [1]0.1586553 You can also obtain the same probability using aweb applet. ...
As you know, theZ-scoresare normalized scores that serve the purpose of taking scores of a generic normal distribution into equivalent scores in the standard normal distribution (equivalent in the sense of their location relative to their population). Z-scores have numerous applications, the most ...