Answer to: Assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find the 90th percentile for...
Normal distribution has mean μ = 250 and standard deviation σ = 20. Find the 70% percentile for this distribution. Normal Distribution: The normal distribution is used to calculate the percentile rank from the z-score value. The z-score value ...
To demonstrate how much a single outlier can affect the results, let’s examine the properties of an example dataset. It contains 15 height measurements of human males. One of those values is an outlier. The table below shows the mean height and standard deviation with and without the outlier...
6 概率统计之抽样分布一批材料,直径12cm,标准差0.04a.求随机选择直径小于12.08的概率b.求样本大小为16,直径小于12.08的概率c.find the 90% percentile for the sample mean distribution
How to find outliers in SQL with Z-Scores Method The Z-score of an observation is defined as data given in units of how many standard deviations it is from the mean. Although it is common practice to use Z-scores to identify possible outliers, this can be misleading, particularly for sma...
# 1. Create an array with outliers a = np.array([1,1,1,1,1,1,42,1,1]) # 2. Determine mean and standard deviation mean = np.mean(a) std_dev = np.std(a) # 3. Normalize array around 0 zero_based =abs(a - mean)
Answer to: Find the standard score (z-score) and the percentile of a data value which is 2.3 standard deviations below the mean. By signing up,...
Answer to: Find the margin of error for a poll with n = 70, assuming that 95% confidence and \pi = 0.7. By signing up, you'll get thousands of...
Assume the random variable X is normally distributed with mean {eq}\mu {/eq} = 50 and standard deviation {eq}\sigma {/eq} = 7. Find the 77th percentile. Normal Probability Problem: In this question, we will use the standard normal ...
If n=16, x―=35, and s=6, find the margin of error at a 90% confidence level(Answer in two decimal places). Confidence Interval: In this question, we will use the t distribution to define a 90% confidence interval for the population ...