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Identify and justify which type of sampling (random, stratified, systematic, cluster, convenience) is used in the following examples.
a) A market researcher polls 50 people at a local shopping mall.
b) To avoid working late, a control analyst simply inspects the first 100 items produced in a day.
c) A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers.
d) A tax auditor selects every 1000th income tax return that is received.
e) A market researcher selects 500 people from each of 10 cities.
Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
Create Frequency Distribution of Sample Mean. Compute and Identifies Sampling Distribution of Sample Mean.
A standard for full credibility of 1,000 claims has been selected so that the actual pure premium will be within 10% of the expected pure premium 95% of the time. The number of claims has the Poisson distribution. Determine the coeffcient of vari..
Calculate and plot t he new supply schedule and indicate the new equilibrium price and quantity on your diagram
Compute the probability that student eats at fast food restaurant 2 or more times per week?
Create a 90% confidence interval for mean score on this placement exam for all students.
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
What is the probability that he completed the assignments?
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
At the .01 significance level, is there a difference in the use of the four entrances?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Plan the scatter diagram
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