Compare the population means

Assignment Help Accounting Basics

Reference no: EM131002390

The data in the table below are from two populations that may or may not be the same.

XU 0.65	YU 1.01
2.01	1.75
1.80	1.27
1.13	2.48
1.74	2.91
1.36	2.38
1.55	2.79
1.05	1.94
1.55
1.63

(i) Carry out a two-sample t test to compare the population means. What assumptions are required for this to be a valid test? At the α = 0.05 signi?cance level, what does this result imply about the null hypothesis?

(ii) Carry out a MWW test to determine if the two populations have the same me- dians or not. At the α = 0.05 signi?cance level, what does this result imply about the null hypothesis?

(iii) It turns out that the data were generated from two distinct uniform distributions, where the Y distribution is slightly different. Which test, the parametric or the nonparametric, is more effective in this case? Offer some reasons for the observed performance of one test versus the other.

(iv) In light of what was speci?ed about the two populations in (iii), and the p-values associated with each test, comment on the use of α = 0.05 as an absolute arbiter of signi?cance.

Reference no: EM131002390

Questions Cloud

Two-parameter regression model : The following is a set of residuals from a two-parameter regression model:

Find an area with dim lighting to conduct this experiment : Find an area with dim lighting to conduct this experiment. Stand next to the participant and instruct him/her to focus on a distant object. Quickly shine the light into the right eye.

Why does having good plans help project teams : "Why does having good plans help project teams during project execution? Why is it difficult to develop good plans

Comparative advantage in producing fish : Suppose that Kiribati can produce 1000 tons of breadfruit or 500 tons of fish, and that Tuvalu can produce 750 tons of breadfruit or 1875 tons of fish. What is the opportunity cost of 1 unit of fish in Kiribati? Show your work. What is the opportunit..

Compare the population means : Carry out a two-sample t test to compare the population means. What assumptions are required for this to be a valid test? At the α = 0.05 signi?cance level, what does this result imply about the null hypothesis?

Discuss the similarities and differences between organisms : An essay: Discuss the similarities and differences between organisms in the domains Bacteria and Archaea.

Explain how this is reflected in the accounting records : Explain how this is reflected in the accounting records if the shares are formally retired.

What could the government do to increase consumer spending : If the economy is operating at a point less than full employment (as it is now), what would we want to see happen to GDP? For right now, let's just look at the C (consumption) component of our GDP equation. What would we want to see happen to consume..

How this affects the total-marginal and average cost curves : Otto’s Autos buys cars for resale from the manufacturer at the price of $10,000 per car. Assuming there are no other costs, draw Otto’s total, marginal, and average cost curves. Suppose Otto launches a new ad campaign that costs $100,000. On a separa..

User Account

All Pages