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Question: Paying high prices? A retailer entered into an exclusive agreement with a supplier who guaranteed to provide all products at competitive prices. The retailer eventually began to purchase supplies from other vendors who offered better prices. The original supplier filed a lawsuit claiming violation of the agreement. In defense, the retailer had an audit performed on a random sample of 25 invoices. For each audited invoice, all purchases made from other suppliers were examined and compared with those offered by the original supplier. The percent of purchases on each invoice for which an alternative supplier offered a lower price than the original supplier was recorded. For example, a data value of 38 means that the price would be lower with a different supplier for 38% of the items on the invoice. A histogram and some computer output for these data are shown below. Explain why we should not carry out a one-sample t test in this setting
Your appliance manufacturing company recently implemented a just-in-time inventory system for all parts used in the manufacturing process. How might you expect this move to affect the company's inventory turnover rate, current ratio, and quick rat..
How large a sample is necessary to estimate the proportion of interest to within 2% in a 95% confidence interval?
Formulate the null and alternative hypotheses. find the test statistic z value. find the p value. And state the conclusion.
However, my "hour" variable is in data that ranges from 0-23 so 6pm would actually be 18. So do I plug 18 into my regression equation (y intercept +coefficient of hour*18?) or do I still do 6?
The following exercises involve constructing definitions:- Invent stipulative definitions for two new words that you wish to introduce into the language for the first time.
What is the probability that a seed from this cross will be green? Set up a simulation to answer this question, and estimate the probability from 25 repetition.
A street performer approaches you to make a bet. He shows you three cards: one that is blue on both sides, one that is orange on both sides, and one that is blue on one side and orange on the other.
Find the t-value such that the area in the right tail is 0.02 with 19 degrees of freedom.
Some critics of big business argue that CEOs are overpaid and that their compensation is not related to the performance of their companies. To test this theory, Chief Executive (Sept. 1999) collected data on executive's total pay and company..
The math grades on the final exam varied greatly. Using the scores below, how many scores were within one standard deviation of the mean? How many scores were within two standard deviations of the mean?
a stoplight at the corner of lincolnway and duff avenue is red 20 of the time. for someone who drives through this
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
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