Michael3940 Michael3940

13-12-2022
Mathematics

Answered

A certain component is critical to the operation of an electrical system and must be replaced immediately upon failure. The mean life of this type of component is 120 hours and its standard deviation is 27.5 hours. You plan on stocking a random sample of these components, and on calculating the probability that the average life of the components is greater than 112.13 hours. What is the minimum sample size needed so that the above probability is at least 0.95. Round up if needed. The sample has to have at least components.

Answer :

Other Questions

Let S represent the number of randomly selected adults in a community surveyed to find someone with a certain genetic trait.The random variable S follows a geom

Noise levels at 5 airports were measured in decibels yielding the following data:162,176,162,141,159Construct the 90% confidence interval for the mean noise lev

If the graphs of the lines in the system of equations above the intersect at (-3,1), what is the value of K/H? A) 3/2 B) 2 C) 3 D) 6

X1,..., X are i.i.d. standard normal variables. Denote by An the sample mean of the squares of these variables: 1.:- x - - * - }(x2 + x3 + .. + x2). 1 Recall An

Buford has generously offered to assist the Fireside Girls troop 46231 in their annual cheese sale. Last year, there was a significant amount of cheese left ove

the function d defined above models the depth, in feet, of the water t hours after 12 a.m. in a certain harbor. which of the following presents the method for f

In a network of 39 computers, 4 have a copy of a particularly critical file to sustain an organization's regular operations. Suppose that 8 computers at random

Ravi sells real estate. Based on previous data, he knows that 5% of home tours result in a sale. Assume that the results of these tours are independent from eac

Suppose previous research suggests that the mean length of all adult Anacondas is 13 feet with a standard deviation of 2.4 feet. Let W be the random variable th

Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. One has 95% confidence that the interval from the low