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A board of directors at the Anchor Pointe Marina is studying the usage of boats among its members. A sample of 30 members who have bots 10 to 20 feet in length showed that they used their boats an average of 11 days last July. The standard deviation of the sample was 3.88 days. For a sample of 40 members with 21 to 40 feet in length, the average number of days they used their boats in July was 7.67, with standard deviation of 4.42 days. At the 0.02 significance level, can the board of directors conclude that those with the smaller boats used their crafts more frequently?
In these questions we have to make a decision about the given claim. For example, if the claim is that a coin favors heads and sample results consists of 11 heads in 20 flips, conclude that there is not sufficient enough evidence to support the cl..
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
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Method of assigning probabilities based on historical data is known the?
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
That's a much larger sample than standard sample surveys. In spite, we cannot trust result to give good information about any clearly defined population. Explain why?
A company uses triple time estimates to determine expected completion time for all of their projects. If they determined the expected time to complete a project is 25 weeks with a variance of of 9 weeks
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
Construct a bar and pie chart to graphically display these data by using Microsoft excel.
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