Hypotheses for a right-tailed test

Assignment Help Basic Statistics

Reference no: EM1319128

Q1) To test hypothesis that students who finish exam first get better grades, Professor Hardtack kept track of order in which papers were handed in. First 25 papers showed a mean score of 77.1 with standard deviation of 19.6, while last 24 papers handed in showed mean score of 69.3 with standard deviation of 24.9. Is this significant difference at α = .05?

a) State the hypotheses for a right-tailed test.

b) Get a test statistic and p-value suppose equal variances.Interpret these results.

c) Is difference in mean scores large enough to be important?

d) Is it sensible to assume equal variances?

e) Carry out a formal test for equal variances at α = .05, showing all steps clearly.

Reference no: EM1319128

Questions Cloud

Inelastic or unit elastic at the profit-maximizing price : Illustrate what price-quantity comb I country maximizes your firm's profits. Is Demand elastic, inelastic or unit elastic at the profit-maximizing price-quantity combination.

Determining machining costs by activity-based costing : Hagar Co. computed an overhead rate for machining costs ($1,500,000) of $15 per machine hour. Machining costs are driven by machine hours. If computed based on direct labour hours, the overhead rate for machining costs would be $30 per direct labo..

Apply the mathematical model to solve problems : Apply the mathematical model to solve problems

Scatter diagram and coefficient linear correlation : Draw a scatter diagram of the following bivariate data.

Hypotheses for a right-tailed test : State the hypotheses for a right-tailed test.

Finding standard error of mean : Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.

How many days do they require to sample : The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 ..

How a profit from selling the drug : Elucidate how a profit from selling the drug. This is, in part, due to the fact to the company spent $1.2 billion developing the drug also obtaining FDA approval.

Sell of corporate bonds : Cathy purchased several corporate bonds from a large corporation five years ago. Cathy recently lost her job and has decided to sell the corporate bonds.

User Account

All Pages