A statistical value in a calculation

A standard score is $\displaystyle \frac{95-\bar{x}}{s}\times 10+50$, where $\displaystyle \bar{x}$ is the mean and $\displaystyle s$ is the sample standard deviation. Press and , type 95, and press . The mean is , , , . Press and . The sample standard deviation is , , , . Press , type 10, press , type 50, and press . The answer is 64.43210706.

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