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Measurements of the flexible strength of carbon fiber are carried out during the design of a leg prosthesis. After 20 measurements, the mean is calculated

Measurements of the flexible strength of carbon fiber are carried out during the design of a leg prosthesis. After 20 measurements, the mean is calculated as 1700 MPa with a standard deviation of 350 MPa. Previous data on the same material shows a mean of 1750 MPa with a standard deviation of 250 MPa. Use this information to estimate mean and standard deviation of the posterior distribution of the mean

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