MIS770 - Foundation Skills in Data Analysis - IT/Computer Science Assignment Help

Assignment Task

QUESTION 1

(a) (i) Give example. eg. suburbs. Explain how the sample could be split up acrosssuburbs

(ii) Give example. eg. sample taken from only Auction results. Explain why

(b) Except for very small populations, the sample size required is in effect independent of the population size. For example, the sample size will be the same or similar for populations of size 5000, 50000, 500000, etc. (given the same confidence level, ME and population SD). Could also discuss how the Central Limit Theorem (CLT) shows us that irrespective of the underlying population distribution, as long as the sample size is greater than 30 or so, the underlying distribution of the sample means will also be approximately normal, therefore population parameter estimates will be useful/valid.

(d) Quantitative (Numerical)

(e) Column charts are generally used with categorical data. However, since Number of Bedrooms is a discrete numerical variable with only a small number of possible values (from 2 to 5 bedrooms) it could be used in this case.

QUESTION 2

(a) If Goodbuy’s management were interested only in the expenditure per visit of their customers,would a sample or census be the most appropriate? Explain.

(b) Suppose Goodbuy’s management decided to collect the data on ‘Time Shopping’ on a weekly basis. Would calculating summary measures and drawing histograms be an appropriate way to analyse the data? If not, what techniques would be appropriate ?

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