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A bank manager has been presented with a new brochure that was designed to be more effective in attracting current customers to a personal financial counseling session that would include an analysis of additional banking services that could be advantageous to both the bank and the customer.
The manager's assistant, who created the new brochure, randomly selects 400 current customers, then randomly chooses 200 to receive the standard brochure that has been used in the past, with the other 200 receiving the promising new brochure that he has developed.
Of those receiving the standard brochure, 35% call for more information about the counseling session, while 42% of those receiving the new brochure call for more information.
Using the 0.10 level of significance, is it possible that the superior performance of the new brochure was just due to chance and that the new brochure might really be no better than the old one?
1. the quality-control manager at a light bulb factory needs to determine whether the mean life of a large shipment of
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
a manufacturer of plumbing fixtures has developed a new type of washerless faucet. let p p a randomly selected faucet
What proportion of the first 70 digits in the table are 0s (there are 40 digits in line 101 followed by the first 30 in line 102)?
Statistical probability is most closely associated with which of the types of statistics - Which of the following sampling procedures represents non-probability sampling - normal distribution probabillity model for the study statistical analysis
Use an examination of the views of expert academics and a sample of real world case studies to support a discussion of the role and importance of Professionalism and Professional Ethics in the Information Technology industry.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
You plan to see a movie this weekend. Based on these movies, how long do you expect a typical movie to run?- Would you be surprised to find that your movie ran for 2 1/2 hours (150 minutes)?
1. what is the purpose of conducting an experiment? how does an experimental design accomplish its purpose?2. what are
For many school systems, an IQ of 70 indicates that the child may be eligible for special education. What proportion of the general population has an IQ of 70 or less?
Determine a 95% confidence interval for the mean battery lifetime assuming the population standard deviation is not known. Interpret it. What is the margin of error in this confidence interval?
q1. a recent study shows that 20 of all employees prefer their vacation time during march break. if a company
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