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You plan to conduct a marketing experiment in which students are to taste one of two different brands of soft drink. Their task is to identify the brand tasted. You select a random sample of 200 students and assume that the students have no ability to distinguish between the two brands. (Hint: if an individual has no ability to distinguish between the two soft drinks, then each brand is equally likely to be selected).
1. What is the probability that the sample will have between 50% and 60% of the identifications correct?2. The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?3. What is the probability that the sample percentage of correct identifications is greater than 65%?4. Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
What is the technical definition of alpha? When might a "high level of proof" be required in business? Why does a "high level of proof" mean a small value of alpha?
Testing for population proportion - evidence that the proportion of data processing clerks who have gone through the new training and are no longer employed is less than .25?
A sample of 400 tickets has 72% 1's. What percentage of the entire box do you expect to be 1's? What is the standard error of your estimate?
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.
Determine the minimum sample size required in order for you to be confident that your evaluate is within of? Use value for population standard deviation of scores on this subsection.
Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
A survey of 100 clients of pacific gas and electric resulted in the following frequency distribution of monthly charges.
In order to determine the effect of secondhand smoke, the state agency needs to measure the nicotine level at the work site. It is not possible to measure the nicotine level for every company that reports to the agency.
The following frequency distribution reports electricity cost for sample of 50 two-bedroom apartments in Albuquerque, New Mexico during the month of May last year.
The width of a confidence interval will be:
There are two boxes, Box A and Box B. Box A has 40 tags with the number 1, 50 tags with the number 10, and 10 tags with the number 100. Box B has 40 tags with the number 100, 50 tags with the number 10, and 10 tags with the number 1.
The model that result is: y= 0.6 + 1.2x, where the dependent variable is the amount of sales, in thousands of dollars, realized during the week and the independent variable is the amount spent on newspaper advertising, in hundreds of dollars, duri..
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