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Question: You are considering developing a regression equation relating a dependent variable to two independent variables. One of the variables can be measured on a ratio scale, but the other is a categorical variable with four possible levels.
a. How many dummy variables are needed to represent the categorical variable?
b. Write a multiple regression equation relating the dependent variable to the independent variables.
c. Interpret the meaning of the coefficients in the regression equation.
An alternative to the p chart for the fraction defective is the np chart for number defective. This chart has and the number of defectives from each sample is plotted on the chart. Construct such a chart for the data of Example 16.6.
Natural Science, 415; Social Science, 511; Business Administration, 619; Philosophy, 196. Create a Pareto chart representing this information.
let x1x2x3 be a random sample of size three from a distribution with the probability density function.fx 2x 0ltxlt1find
The important thing to keep in mind when using that statistic is that there may be situations in which it would be completely misleading to compare Person A's cost per mile with Person B's cost per mile.
What are the estimated monthly sales for a particular region with a population of 796,000, per capita income of $6,940, and an unemployment rate of 6.0 percent?
What is your conclusion regarding null hypothesis?
A random process X (t ) consists of three-member functions- Find the mean function.- Find the autocorrelation function. - Is the process WSS? Is it stationary in the strict sense?
Draw a sketch of the standard normal distribution curves, one for the current process and another one for the recentered process. Label the spec limits and shade the area of the curve that corresponds to your answer.
The length of time recorded is normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. What is the probability that and individual will be able to keep eye contact longer than 239 seconds?
Explain what an outlier is
Crawling. A study published in 1993 found that babies born at different times of the year may develop the ability to crawl at different ages!
Explain a method of randomizing the experimental units to the levels of factors A, B, and C in this experiment.
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