Compare the population means

Assignment Help Basic Statistics
Reference no: EM131001601

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























(i) Carry out a two-sample 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 medians 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 di?erent. 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: EM131001601

Population mean weight of athelete

At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pou

Determine posterior predictive probability and extreme value

Determine the posterior predictive probability P(y > .5/ y1,.... , y120) (the probability of a dangerous mercury level) and also the extreme value P(y > 3.0/y1, . . . , y120).

Classify variable in model as quantitative or qualitative

The researchers built a model for predicting winning time (y) of the marathon as a function of year (x1) in which the race is run and gender (x2) of the winning runner. Classi

The time taken to assemble a car in a certain plant

11) The time taken to assemble a car in a certain plant is a random variable having a normaldistribution of 20 hours and a standard deviation of 2 hours. What is the proba

Determine the length of an order cycle

She knows that each order for these bills costs $300 for clerical and armored car delivery costs, and that order lead time is six days. Assuming a thirty-day month, if she w

Hypothesis proposed by the researchers

The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the

Questions on correlation and regression

In this problem set you will get some practice performing a linear regression analysis. If you use Statdisk or Excel to perform any portion of these analyses, please include

Translate into symbolic form - protein engineering

Translate the following arguments into symbolic form.- Protein engineering will prove to be as successful as genetic engineering, and new enzymes will be developed for produc


Write a Review

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd