X is normally distributed with mean 250 and standard deviation 40. What value of X does only the top 15% exceed?
Answer to relevant QuestionsX is normally distributed with mean 1,000 and standard deviation 250. What is the probability that X lies between 800 and 1, 100?Refer to Exercise 8.40. If we wanted to be sure that 98% of all bulbs last longer than the advertised figure, what figure should be advertised?University and college students average 7.2 hours of sleep per night, with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of university and college students sleep for more ...How much money does a typical family of four spend at a McDonald’s restaurant per visit? The amount is a normally distributed random variable with a mean of $16.40 and a standard deviation of $2.75.a. Find the probability ...Every day a bakery prepares its famous marble rye. A statistically savvy customer determined that daily demand is normally distributed with a mean of 850 and a standard deviation of 90. How many loaves should the bakery ...
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