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Question: A management consultant wants to determine whether the age and gender of a restaurant's wait staff influence the size of the tip the customer leaves. Three age brackets (factor A in columns: young, middle-age, older) and gender (factor B in rows: male, female) are used to construct a random block experiment. For each combination, the percentage of the total bill left as a tip for 10 wait staff is examined. The following ANOVA table with a = 0.01 is produced.
a. Can you conclude that there is interaction between a g e and gender at the 1% significance level?
b. Are you able to conduct tests based on the main effects? If yes, conduct these tests at the 1 % significance level. If no, explain.
explain the difference between the information given by a test of statistical significance such as chi square and a
an abrupt transition occurs at a reynolds number of about 3x105 where the drag on a sphere moving through a fluid
Computer use. A Gallup telephone poll of 1240 teens conducted in 2001 found that boys were more likely than girls to play computer games.
If the station did not have access to appropriate computer software or a table of random digits, explain how they could randomly choose a birthday each day.
Employee salaries at a certain company are normally distributed with a mean salary of $59000 and a standard deviation of $7100 1. Find the z-score for a salary of $70400
a well insulated piston-cylinder device with a free floating piston contains 1 kg of a 25 quality saturated misture of
find the indicated iq score. the graph to the right depicts iq score of adults and those scores are normally
the marketing department of a major cereal manufacturer is doing a national taste test on flake cereals. there are five
Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved. what's the standard error of the difference in the two proportions?
Formulate the linear programming problem, calculate optimum quantities of products slacks and total profit and also conduct sensitivity analysis accordingly using simplest method ?
Verify that this gambling interpretation leads to the correct answer for all starting states in the examples that you worked in Exercise 28.
Test if the proportion of students scoring abve 600 is lower than 0.4 at the center at alpha = 0.01 using p-value.
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