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17.65 The production engineer for the manufacturing plant in Exercise 17.61 has just included another vari- able: the worker's gender, coded as 1 5 female and 0 5 male. File XR17065 contains the expanded set of data. With y 5 productivity (units/hour), x1 5 number of units in the backlog area, and x2 5 gender, fit a first- order model with no interaction term. Interpret the par- tial regression coefficients and the R2 value. At the 0.02 level, is the model significant?
17.66 The sales director for an industrial supplies firm has collected information describing the performance and personal characteristics of 80 members of her sales force. The data in file XR17066 include the percent of sales quota the salesperson achieved last year, age, number of years with the firm, and personal appearance (very neat, about average, or a little sloppy). In the data file, a very neat person is coded as neat 5 1, average 5 0, a person of average neatness is coded as neat 5 0, average 5 1, and a sloppy person is coded as neat 5 0, average 5 0. With y 5 percent of sales quota, perform a linear regression using the other variables as predic- tors. Interpret the partial regression coefficients and the R2 value for the model. At the 0.05 level, is the model significant?
The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows: Compute the mean and standard deviation of this distribution.
in linear regression the dependent variable must be
What is the amount of net income earned during the month of March?
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
Determine the percentage of samples of size 16 that will have mean amounts of coffee within 0.1 ounce of the population mean of 8.2 ounces.
The mileage per day is distributed normally. Find the probablitly that a truck drives at least 133 miles in a day. Round your answer to 4 decimal places.
There is not enough information to answer the question, the formula requires knowing the population standard deviation for Mark and Debbie, and we were not given this information.
about 6 of the population has a particular genetic mutation. 600 people are randomly selected.find the standard
pens are sold in packets of 15 pens per packet. the pens are of different colour and 20 are red.a show the the
In the data collected for construction of c chart, the average number of defects per unit of output is c = 7.5. Discuss the 3-sigma upper and lower control limits for the control chart?
a consumer group rated 12 manufactured products imported from a single source on a scale of 1 to 10. the data are shown
use technology to find the p-value for a right nailed test with n12 and t1.318. how do you find this answer on a ti-84
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