Describing normality issue

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

Questions Cloud

Graph the equation : Graph the equation.

Creating program for furniture company : Write down a program for the furniture company. Direct the user in order to select O for oak, P for pine, or M for mahogany. Display the price of a table manufactured along with the chosen wood.

Esser crime of attempted arson : Jude necessarily also committed the lesser crime of attempted arson. In this circumstance attempted arson is what type of offense?

Carrying out the investigation : You work for the mid-size corporation that is known for its inventions that does the lot of work of copyright and patent. You are investigating an employee suspected of selling and distributing animations generated for your corporation.

Describing normality issue : Create a 95 % confidence interval for the true mean. Why might normality be the issue here?

Find out if there is a difference among the income of adults : The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.

Determine the x and y intercepts : Determine the x and y intercepts.

Value of the proportion of the population : Compute the value of the proportion of the population.

Determining more variation in first population : Standard deviation of 7. At 0.01 significance level, is there more variation in first population?

User Account

All Pages