Acrylic bone cement is sometimes used in hip and knee replacements to fix an art

Question

Acrylic bone cement is sometimes used in hip and knee replacements to fix an artificial joint in place. The force required to break an acrylic bone cement bond was measured for six specimens under specified conditions, and the resulting mean and standard deviation were 303.39 Newton and 43.37 Newtons, respectively. Assuming that it is reasonable to assume that breaking force under these conditions has a distribution that is approximately normal and using 95% confidence level, the true average breaking force i for acrylic bone cement under the specified conditions.

Explanation / Answer

Statistical software output for this problem is:

One sample T confidence interval:
: Mean of population

95% confidence interval results:

Rounding off to the nearest whole numbers:

258 < f < 349

Mean Sample Mean Std. Err. DF L. Limit U. Limit 303.39 17.705728 5 257.87598 348.90402

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