
### Instruction: help me answer this question Find the mean, variance and standard deviation using short-cut method, think step by step
### Assistant: To find the mean, variance, and standard deviation, the reader must first calculate Yi, Yi2, fiyi, and fiyi2, then use those values to find the mean, variance, and standard deviation using the formulae provided in the question. , The answer is The mean is 93, variance is 105.583, and standard deviation is 10.275.
