Urgent help required ... stats?

1. The archaeological site of Tara is more than 4,000 years old. Tradition states that Tara was the seast of the high kings of Ireland. Because of its archaeological importance, Tara has received extensive study. Suppose an archaeologist wants to estimate the density of ferromagnetic artifacts in the Tara region. For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined.


(a) Identify the variable


(b) Is the variable quantitative or qualitative?


(c) What is the implied population?





2. Categorize these measurements associated with a robotics company according to level: nominal, ordinal, interval, or ratio.


(a) A salesperson’s performance: below average, average, above average


(b) Price of company’s stock


(c) Names of new products


(d) Temperature (Fahrenheit) in CEO’s private office


(e) Gross income for each of the past five years


(f) Color of product packaging

Urgent help required ... stats?
#1


a) the density of ferromagnetic artifacts in the Tara Region


b) quantitative (we are measuring/counting)


c) the entire Tara Region





#2


a) ordinal - qualitative but ordered


b) ratio - if the stock price doubles, the company is worth twice as much (0 has a meaning - company has no value)


c) nominal - qualitative but no obvious ordering


d) interval - a temperature of 0 doesn't mean there is a complete absence of heat. An increase from 50 to 100 doesn't mean twice as hot. but it does mean that it is 50 degrees warmer. Temperature on the Kelvin scale is ratio since 0 means by definition absence of heat.


e) ratio (0 means no income, 50k to 100k means twice as much income)


f) nominal - qualitative with no obvious ordering





Terse answers but I hope they help.





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