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A metallurgical engineer is about to begin a comprehensive study to determine the effects of six variables on the strength of a certain type of a Hoy.
(a) If a 26 factorial design were used how many runs would be made?
(b) If a2 is the experimental error variance of an individual observation, what is the variance of a main effect'?
{c) What is the usual formula for a 99% confidence interval for the main effect of a factor?
(d) On the basis of some previous work it is believed that a-= 8000 pounds. If the experimenter wants 99% confidence intervals for the main effects and interactions whose lengths are equal to 4000 pounds (i.e., the upper limit minus the lower limit is equal to 4000 pounds), how many replications of the 26 factorial design will be required?
Express the null hypothesis and the alternative hypothesis in symbolic form. A skeptical paranormal researcher claims that the proportion of Americans
A sample of 200 traffic accidents this year showed 74 persons were also involved in another accident within the last five years. Use the .01 significance level. Can we use z as the test statistic? Tell why or why not.
For this situation, state the null and alternative hypotheses in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.
Calculate the slope and intercept of the least-squares line. (Give the answer to three decimal places.). Compute an estimate of the average runoff volume when rainfall volume is 75.
you want to give a bonus to the top 5 of your sales people and extra special attention to the bottom 25. average sales
An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. At the end of the semester, she has the following grades.
A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years.
1. many television viewers express doubts about the validity of certain commercials. in an attempt to answer their
suppose the cost of an observation varies from stratum to stratum where the cost of sampling a unit from stratum j is
Using assumed true population percentages of 2%, 3%, 4%, 5%, 6%, and 7%, plot the power curve for the test in given Exercise.
The average burglary rate for a particular jurisdiction has been 311 per year with a standard deviation of 50. What is the likelihood that the number of burglaries in the next year is between 250 and 300?
Let X denote the number of defective items in the sample, and let Y denote the number of non-defective items. Find £( X - Y).
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