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MINI CASE 5.2
In this report, readers are invited to compare the value of Devon's tourism with other South West counties via a series of pie charts. You can see that the number of tourist trips to, and nights stayed in, Devon are higher than the other counties. The amount spent by tourists travelling to Devon is also one of the highest. More detail of these comparisons is also tabulated.
A regression was built to predict the dollar value of a customer transaction. A three-level categorical variable distinguishes cash and credit purchases made in person from online purchases.
a memory researcher shows each study participant a list of words on a computer with some participants seeing words that
The company may test the potential of the rural market for a cost of $25,000. The test has a 90% reliability of correctly detecting the state of nature. Construct the decision tree and determine the optimal decision.
A neurologist wants to detect whether the mean response time for drug-injected rats differs from a control group not injected. The control group has the mean response time of 1.2 seconds.
Provide one bar chart for each hospital. This means seven charts for all seven hospitals. Then, provide bar chart to compare data from hospital one with data from other six hospitals.
Which of the numbers you calculated is a better measure of the central tendency of the heights given? Give a specific statistical reason for your conclusion.
a teacher finds that the scores of a particularly difficult test were normally distributed with a mean of 76 and
The average chain length of a polymer produced in a batch reactor is given as 200 units, where chain length itself is known to be a geometric random variable. What fraction of the polymer product is expected to have chains longer than 200 unit..
Use Excel or a statistical package to derive the variance-covariance matrix from the data above.
Conduct an ANOVA comparing anxiety levels (at post test only) of participants across all three treatments, conduct post hoc test if needed.
A contractor is considering a sale that promises a profit of $37,000 with a probability of 0.7 or a loss of (due to bad weather and such) of $18,000 with a probability of 0.3. What is the expected profit?
Find a 95% confidence interval for the mean daily caloric intake. Interpret this interval.
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