Determining standard deviation of difference of scores

Assignment Help Basic Statistics

Reference no: EM1320672

Q1) One hundred Lower Wabash Tech students take 10-question multiple-choice test with four answers to each question, exactly one of which is right. All of students are unprepared and should guess at each question.

i) How many unprepared students would have to take this test to assure ten score of 6? Ten scores of 7? Ten scores of 8? Illustrate your work or describe your reasoning.

ii) Sarah also takes test, and she wishes to know how many right answers she and Richard can expect to get all together. Answer Sarah's question.

iii) Determine the standard deviation of difference between Sarah's and Richard's scores?

iv) Richard wishes to know how many questions he will have to answer until he gets one correct. Has random variable changed (i.e., is it now different from one you identified in (a)?)? If so, recognize this new random variable and give explanation for your answer. Then answer Richard's question.

Reference no: EM1320672

Questions Cloud

Effects of monetary policies on the economys production : Explain the effects of monetary policies on the economy's production also employment

Solving problem on distributive laws : Solving problem on distributive Laws

Credit rating from population with mean : Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.

Designing the flow chart : Draw a flowchart describing the following given situations: The data found on employee time cards are keyed onto the hard disk before they are processed by the computer.

Determining standard deviation of difference of scores : Determine the standard deviation of difference between Sarah's and Richard's scores?

Steps in formulating marketing strategy : In a short essay, explain how and why marketers go beyond selling a product or service to create brand experiences. Define marketing strategy. Discuss the steps in formulating marketing strategy

Ben laden is considering an attempt to differentiate : Ben Laden is considering an attempt to differentiate his product from several other competitors by using high quality natural herb dyes.

Wireless networking : Explain the origins/genesis of the wireless networking. Explain the devices included used and how they operate.

Domestic produces often base their claim for import : Domestic produces often base their claim for import protection on the fact that workers in country X are paid substandard t wages.

User Account

All Pages