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An enterprising art historian recently started a new business: the production of walking-tour audiotapes for use by those visiting major cities. She originally produced tapes for eight cities: Paris, Rome, London, Florence, Jerusalem, Washington, New York, and New Haven.
A test was carried out to determine whether all eight tapes (featuring different aspects of different cities) were equally appealing to potential users. A random sample of 160 prospective tourists was selected, 20 per city. Each person evaluated the tape he or she was given on a scale of 0 to 100.
The results were analyzed using one-way ANOVA and included SSTR = 7,102 and SSE = 10,511. Are all eight tapes equally appealing, on average? What can you say about the p-value?
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He recorded the store's sales for those four Wednesdays and then recorded the store's sales for the four alternate Wednesdays, when the signs were not displayed. On the Wednesdays with the sign, the sales were 83, 73, 81, and 79. On the Wednesdays..
while writing an article on the high cost of college education a reporter took a random sample of the cost of new
Assume that a normal model with a mean 263 days and standard deviation can describe the duration of human pregnancies 12 days. At least how many days should the longest 30% of all pregnancies last?
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