A type of golf ball is tested by dropping it onto a hard surface from a height of 1 metre. The height it bounces is known to be normally distributed. If a sample of 100 balls are tested and the mean height of the bounces = 82 cm. and standard deviation = 3.6 cm Find a. 90% b. 95% and c. 99% confidence intervals for the mean bounce height of the golf ballI.

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