Probability of finding a household

Reference no: EM13990281

A recent survey by a local municipality established that daily water usage by its households is normally distributed with a mean of 220 litres and a standard deviation of 45 litres.

(a) Use standard normal z-tables to answer the following questions:

(i) What percentage of households is likely to use more than 300 litres of water per day?

(ii) What is the probability of finding a household that uses less than 100 litres of water per day?

(iii) What is the most amount of water used per day by the lowest-consuming 15% of households?

(iv) The municipality plans to implement a differential tariff policy to charge households that use more than a certain volume of water per day a higher rate per litre. If the municipality wants no more than 20% of households to pay this higher rate per litre, how much water per day must a household use before they will pay the higher rate per litre?

(b) Use the Excel function NORMDIST to solve (a)(i) and (ii).

Reference no: EM13990281

Questions Cloud

Determining the minimum mass of the heaviest : (a) What percentage of the containers is not likely to meet the producer's specification of at least 18 grams per container? (b) What is the minimum mass of the heaviest 15% of containers?

Determine the size of one frame : You have a 5 second movie you want to send over an DSL connection. The movie resolution is 5000 x 3000 and uses 40 frames per second. Determine the size of one frame

Presentation of a stimulus and braking : Assume reaction times (after two hours of non-stop driving) are known to be normally distributed, with a mean of 1.4 seconds and a variance of 0.0625 seconds. Reaction times would be recorded (in seconds between the presentation of a stimulus and ..

What is the size of one second of filming : You are a movie producer. You have ordered film to be shot at a resoluton of 2002 x 3000 at 64 bit color. What is the size of one frame, WHat is the size of one second of filming and What is the total size of the file

Probability of finding a household : (a) Use standard normal z-tables to answer the following questions: (i) What percentage of households is likely to use more than 300 litres of water per day? (ii) What is the probability of finding a household that uses less than 100 litres of water ..

State seller who misrepresent goods sold over the internet : Blimka v My Web Wholesalers, LLC case. Blimka is Suing My Web Company due to receiving bad merchandise. Blinka is an Idaho resident who found the My Wed when surfing in the internet, this company is in Maine. the Idaho high court held that Idaho cour..

In emily''s first solo attempt on a bike : In Emily's first solo attempt on a bike, she hits the curb and falls forward over the handlebars hitting the curb hands first. What skeletal elements might be injured in this fall? Trace the pathway of stress to the bones and indicate the most like..

Prepare journal entries for eight following transactions : Prepare the journal entries for the eight following transactions. Use dates but descriptions are not required. On 10/1/15, Equipment was purchased for $10,000 cash down payment and a 10% per annum promissory note of $40,000.

Z-table and then the appropriate excel function : Calculate the results for (a)-(c) using the z-table and then the appropriate Excel function (i.e. NORMDIST or NORMINV).

User Account

All Pages