The lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour. there
are nine batteries in a package. what lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (round your answer to two decimal places.)
The probability that a normally distributed dataset with a mean, μ, and statndard deviation, σ, exceeds a value x, is given by
Given that t<span>he lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour and that the probability that </span><span>nine
batteries in a package exceeds a certain value, x, is </span>5% or 0.05. Then the value x is given by
The formula for perimeter is P = 2l + 2w and the area is A = l×w. Assuming that the perimeter and area have the same values so you have to compare it :