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A consumer survey indicates thatthe average household spends µ=300 TL on heating per month during winter. The distribution of spending amounts is approximately normal with standard deviation 50 TL. Based on this distribution
a) What is the probability of randomly selected a family that spendsmore than 230 TL per month on heating*
b)What is the probability of randomly selecting a group of 10 family that spends on the average more than 230 TL per month on heating
c) If we randomly select 150 families, what is the probability that at most 140 of them spends more than 230 TL per month on heating?
d) How much money do you need to spend on heating each month to be in
the top 29%of the distribution?
Apr 22 2020 View more View Less
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