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A normal distribution has a mean of 140 and a standard deviation of 40. How do you calculate a percentile rank of a score of 172? | Socratic
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Calculate the mean, variance and standard deviation for the following distribution: Class 30-40... - YouTube
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Calculating mean and standard deviation in R in one column depending on factors in other columns - Stack Overflow
![Calculate the mean, median and standard deviation of the following distribution:Class - interval: 31 - 35 36 - 40 41 - 45 46 - 50 51 - 55 56 - 60 61 - 65 66 - 70 Frequency: 2 3 8 12 16 5 2 3 Calculate the mean, median and standard deviation of the following distribution:Class - interval: 31 - 35 36 - 40 41 - 45 46 - 50 51 - 55 56 - 60 61 - 65 66 - 70 Frequency: 2 3 8 12 16 5 2 3](https://haygot.s3.amazonaws.com/questions/1415549_1668050_ans_79b0431e3c3a4d79bd972a94f5934923.jpg)