Application of probability in battery life

Reference no: EM1399378

1. Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours. The best 65% of batteries would last beyond how many hours? Answer correct to 2 decimal places

2. The average and standard deviation of the amount of Goods and Services tax remitted by performance artists in a twelve month period were $5.042 thous and $1.551 thous respectively. If a sample of 110 artists was taken, find the average value above which only 15% would lie. Give your answer in dollars to the nearest dollar.

Reference no: EM1399378

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