A ________ confidence interval might be most appropriate during the early stages of a research project when little is known about the population's parameters and the project's researchers might still be gauging the parameters.
A) 90
B) 95
C) 99
D) 100
Question 2
Suppose the local Best Buy store averages 483 customers per day entering the facility with a standard deviation of 112customers. A random sample of 48 business days was selected.
What is the probability that the average number of customers in the sample is between 480 and 500?A) 0.1579
B) 0.2521
C) 0.3377
D) 0.4284
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Researchers and Research Spending, 2009
Research