Answer:
To find the mean (average) and standard deviation of a data set, you need more information than just the percentiles (such as 80% below 110.6mm and 10% below 68.2mm). You would typically need either the individual data points or additional statistics like the median or quartiles.
The mean and standard deviation are measures of central tendency and variability that require more detailed data to be calculated. If you have the full data set or more information, please provide it, and I can help you calculate the mean and standard deviation.
Explanation:
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