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Estimating 95% confidence interval for the given data.
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
A. For a 90 percent confidence interval, what is the value of t?
B. Develop the 90 percent confidence interval for the population mean.
C. Would it be reasonable to conclude that the population mean is 63 pounds?
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
What percent of trucks logged more than 57,060 but less than 58,280 miles? What percent of Fords travelled 62,000 miles or less in the year?
What percent of the Fords traveled 62.000 miles or less during the year?
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
A manufacturer of billiard balls is testing three additives to the basic plastic. Show the partial ANOVA table
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What control limits should be applied to his sample?
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Find the probability that exactly 15 flights arrive on time.
Test hypothesis that annual incomes of corporate trainers in areas of more than 500,000 are considerably more than those in areas of less than 100,000. Make use of the 5% level of risk.
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