What is the probability that one randomly selected rayovac

Reference no: EM13606480

A popular flashlight that uses two D-size batteries was selected, and several of the same models were purchased to test the "continuous-use life" of D batteries. As fresh batteries were installed, each flashlight was turned on and the time noted. When the flashlight no longer produced light, the time was again noted. The resulting "life" data from Rayovac batteries had a mean of 21.2 hours. Assume these values have a normal distribution with a standard deviation of 1.37 hours. (Give your answers correct to four decimal places.)

(a) What is the probability that one randomly selected Rayovac battery will have a test life between 20.6 and 21.4 hours?

(b) What is the probability that a randomly selected sample of 6 Rayovac batteries will have a mean test life between 20.6 and 21.4 hours?

(c) What is the probability that a randomly selected sample of 19 Rayovac batteries will have a mean test life between 20.6 and 21.4 hours?

(d) What is the probability that a randomly selected sample of 63 Rayovac batteries will have a mean test life between 20.6 and 21.4 hours?

Reference no: EM13606480

Questions Cloud

Long term partners pop ping and pam have capital balances : long term partners pop ping and pam have capital balances of 60000 45000 and 30000 respectively. they share in profits

Three point charges lie along a straight line as shown in : three point charges lie along a straight line as shown in the figure below where q1 5.76 microc q2 1.44 microc and q3

What is the minimum allowable volumetric flow rate of the : a computer consists of an array of five printed circuit boards pcbs each dissipating pb 20w of power. cooling of the

All company personnel can perform each service equally well : pet palace provides two types of services to dog owners grooming and training. all company personnel can perform each

What is the probability that one randomly selected rayovac : a popular flashlight that uses two d-size batteries was selected and several of the same models were purchased to test

What is the magnitude of the acceleration while the boulder : a large boulder is ejected vertically upward from a volcano with an initial speed of 40.2 ms. air resistance may be

Lighting is provided by 18 fluorescent bulbs 40 w each and : a classroom is occupied by 55 students and one instructor each generating heat at a rate of 100 w. lighting is provided

Lanora white received her accounting degree in 1992 since : lanora white received her accounting degree in 1992. since graduating she has obtained significan experience in a

What is the persons body weight if the magnitude of the : a close grip lat pull downs involves the upper body in this exercise the person pulls the weight of the upper body arms

User Account

All Pages