Explain new composition course which has significant effect

Assignment Help Basic Statistics

Reference no: EM13109419

State College is estimating new English composition course for freshmen. Random sample of n = 25 freshmen is obtained and students are placed in course during their first semester. One year later, writing sample is obtained for each student and writing samples are graded using standardized evaluation technique. Average score for sample is M = 76. For general population of college students, writing scores form normal distribution with mean of µ = 70.

a. If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?

b. If population standard deviation is σ = 10, is sample adequate to show significant effect? Again, suppose a two-tailed test with α = .05.

c. Briefly describe why you reached different conclusions for part (a) and part (b).

Reference no: EM13109419

Questions Cloud

Meridian plastics corporation case study : You are a supervisor at Meridian Plastics Corporation with 25 people under your supervision. You don't have the power to hire as well as fire employees,

Illustrate what are some of the risks in the grosvenor park : Illustrate what are some of the risks in the Grosvenor park project? Illustrate what are some of the qualitative and quantitative impacts of the risks?

Describe the framework of general model of planned change : Describe the framework of the general model of planned change. Include a discussion of each activity and a typical sequence of events.

Examine the steps you would take to stop the cyber squatter : You are the owner of a registered trade mark and you just discovered that the domain name is being held hostage for a large sum of money. Examine the steps you would take to stop the cyber squatter.

Explain new composition course which has significant effect : If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?

Stakeholder philosophy of social responsibility : Discuss in intellectual detail what sets the affirmative philosophy apart from the stakeholder philosophy of social responsibility and in what areas do the two philosophies overlap?

Formulate a linear programming model for this problem : The industry wants to know the number of pounds of each brand of fertilizer to produce at each plant in order to maximize profit. Formulate a linear programming model for this problem. Solve the model using the computer.

Explain approval for the construction of a new nuclear plant : The board of directors of New England Authority has given approval for the construction of a new nuclear power plant. The plant will want an investment of $250 million.

Average income of sold proprietor cpa : A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695.

User Account

All Pages