How many weeks must pass before likelihood of lake water

Reference no: EM13315984

A lake has a water level which is used to determine if watering restrictions need to be implemented for the neighboring city. Water levels are measured on a weekly basis, and restrictions are placed if the lake level drops below 1060 ft. Weekly water levels are normally distributed with and mean of 1070 ft, and a standard deviation of 4.5 ft.

1) In a given year (52 weeks), what is the probability that there will be watering restrictions for 2 or more weeks? 3 or more weeks?

2) What is the probability tht the water level will drop below 1053.3 ft at least once in the next 10 years (521 weeks)?

3) How many weeks must pass before the likelihood of the lake water level falling below 1053.3 ft at least twice more is 0.90?

Reference no: EM13315984

Questions Cloud

What is the magnitude of the resistive force : For a huge luxury liner to move with constant velocity, its engines need to supply a forward thrust of 7.05 105 N. What is the magnitude of the resistive force

Write a program using the class as defined : Write a program using` the class as defined below. Put the class definition in a separate header file, and put all the functions' code in a separate Resource file.

Explain a/some pattern/s of behaviour that you have observed : Select ONE of these lessons (principles), (the standard of living depends on a country's production)and explain a/some pattern/s of behaviour that you have observed in the media (newspapers, television, radio, Business Review Weekly, The Economist, e..

Find the mass of the stick using method of torques : We used a 100g mass hung from the 10 cm mark on a meter stick. find the mass of the stick using method of torques

How many weeks must pass before likelihood of lake water : A lake has a water level which is used to determine if watering restrictions need to be implemented for the neighboring city. Water levels are measured on a weekly basis, and restrictions are placed if the lake level drops below 1060 ft.

Explain how and why firms practice 3rd degree price : Explain how and why firms practice 3rd degree price discrimination. Use the handout to illustrate your answer (coupons; airlines, mobile phones).

Find probability that the percent absorbed is more than 10 : When a pesticide comes into contact with skin, a certain percentage of it is absorbed. The percentage of the pesticide that will be absorbed during a given tie period can be modeled with a lognormal distribution.

Briefly explain the microsoft case, focusing on precisely : Briefly explain the Microsoft case, focusing on precisely how Microsoft was alleged to have violated the Sherman Act? What was the outcome of the case and why was that decision made?

Determine the force p required to pull the shaft at velocity : A 25-mm diamenter shaft is pulled through a cylindrical bearing. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic velocity of 8.0x10^-4 m^2/s and a specific gravity of 0.91.

User Account

All Pages