The weights would be more than what value

Posted on 2013-10-16 16:36:00 in Statistics by EMMA WATSON

A company produces a lightweight valve that is specified to weight 1365grams. Unfortunately, because of imperfections in the manufacturing process not all of the valves produced weigh exactly 1365 grams. In fact, the weights of the valves produced are normally distributed with a mean of 1365 grams and a standard deviation of 294 grams. Within what range of weights would approximately 95% of the valve weights fall? Approximately 16% of the weights would be more than what value? Approximately 0.15% of the weights would be less than what value?

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