Question
1)Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 93.6 hours and a
1)Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 93.6 hours and a standard deviation of 14.5 hours. The best 65% of batteries wouldlast 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 $6.043 thousand and $1.515 thousand respectively. If a sample of 77 artists was chosen, find the sample average value above which only 15% of sample averages would lie. Give your answer in dollars (to the nearest dollar).
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