Midterm1_sum07-posted-solution

# Midterm1_sum07-posted-solution - BUAD310 Summer 2007...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
BUAD310 Summer 2007 1. What would a z-score of 1.2 indicate regarding Florida’s unemployment rate? a) Florida’s unemployment rate was 1.2 standard deviations above the mean for all states. Answer b) Florida’s unemployment rate was 1.2 standard deviations below the mean for all states. c) Florida’s unemployment rate was 1.2 %. d) Florida’s unemployment rate was 1.2 % higher than the mean unemployment rate. 2. A random sample of 30 CEO’s is drawn from a population of 500 Technology, Telecommunication and Internet Company CEO’s. They selected 10 CEO's from each of the following categories, Technology, Telecommunication and Internet companies. This sampling plan is called: a) Stratified Sampling Answer (selecting from each category) b) Simple Random Sampling c) Cluster Sampling d) Systematic Sampling e) None of the above 3. Determine whether each boldfaced number is a parameter or a statistic. Staff from a telemarketing company dials residential phone numbers in Los Angles at Random. Of the first 120 numbers dials 30% turned out to be unlisted, it is not surprising because 38% of all the Los Angeles residential numbers are unlisted. Another trial of 120 numbers resulted in 41% unlisted numbers. The three bold numbers in order are: a) Statistic, Parameter, Statistic Answer (the first one is calculated from sample, the next from population and the last one from sample). b)
This is the end of the preview. Sign up to access the rest of the document.