Random variable with expected value

Assignment Help Basic Statistics

Reference no: EM13966475

1. Suppose the proportion of rural voters in a certain state who favor a particular gubernatorial candidate is .45 and the proportion of suburban and urban voters favoring the candidate is .60. If a sample of 200 rural voters and 300 urban and suburban voters is obtained, what is the approximate probability that at least 250 of these voters favor this candidate?

2. Let m denote the true pH of a chemical compound. A sequence of n independent sample pH determinations will be made. Suppose each sample pH is a random variable with expected value m and standard deviation .1. How many determinations are required if we wish the probability that the sample average is within .02 of the true pH to be at least .95? What theorem justifies your probability calculation?

Reference no: EM13966475

Questions Cloud

What are the steps in negotiating a contract : What are the steps in negotiating a contract? What should the auditor look for?

Independent of consumption : The amount of soft drink that Ann consumes on any given day is independent of consumption on any other day and is normally distributed with m = 13 oz and s = 2.

Determine the gyroscopic couple and its effect : The rotor of the turbine of a ship has a mass of 2500 kg and rotates at a speed of 3200 rpm counter-clockwise when viewed from stern. The rotor has radius of gyration of 0.4 m. Determine the gyroscopic couple and its effect when: the ship steers t..

Paper - employee theft in the retail system : In a 1-2 page paper, choose one of the fraud categories topic from given topics. Topics- Employee Theft in the Retail System, Crimes in the Entertainment Services System and Fraud in the Sales/Service System

Random variable with expected value : A sequence of n independent sample pH determinations will be made. Suppose each sample pH is a random variable with expected value m and standard deviation .1.

When a customer during the negotiation process : When a customer during the negotiation process is able to get the vendor to accept a clause such as Guarantee of reliability and exercise of due professional care, what does that mean?

Determine the limiting speed of the vehicle around a curve : The engine axis is parallel to the rear axle and the crank shaft rotates in the same sense as the road wheels. The mass of the vehicle is 2200 kg and the centre of the mass is 550 mm above the road level. The track width of the vehicle is 1.5 m. D..

What specific elements of fiction does the essay address : What specific element(s) of fiction does the essay address? (i.e. characterization, setting, perspective, theme, etc.) Identify areas in the story that the essay does not mention that you feel are important.

How can auditors or mas staff assist : What are the potential ramification of poorly written IT contracts? What is the auditor's role? How can auditors or MAS staff assist?

User Account

All Pages