Describing normality issue

Assignment Help Basic Statistics

Reference no: EM1318523

Q1) Sample of 20 pages was taken without replacement from 1,591- page phone directory Ameritch Pages plus yellow pages. On each page, mean area devoted to show ads was measured. (A display ad is a large block of multicoloured illustrations, maps, and text). Data (in square millimetres) are shown below:

0	260	356	403	536	0	268	369	428	536
268	396	469	536	162	338	403	536	536	130

i) Create a 95 % confidence interval for the true mean.

ii) Why might normality be the issue here?

iii) What sample size would be required to obtain the error of ± 10 square millimeters with 99% confidence?

iv) If this is not a reasonable requirement, suggest one that is. (Data are from a project by MBA Student Daniel R. Dalach)(Display ads)

Reference no: EM1318523

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