A distribution of values is normal with a mean of 99.4 and a standard deviation of 81.6. Find the probability that a ran
Posted: Wed Jul 06, 2022 12:24 pm
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Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 5.9-in and a standard deviation of 0.8-in. Due to financial constraints, the helmets will be designed to fit all men except those with head breadths that are in the smallest 2% or largest 2%. What is the minimum head breadth that will fit the clientele? min = What is the maximum head breadth that will fit the clientele? max= Enter your answer as a number accurate to 1 decimal place.
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.3 years, and standard deviation of 2.6 years. The 3% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.