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Three different heat-treatment methods are being tested against four different zinc-coating techniques, with data representing the number of pounds required for a test probe to penetrate the layer of zinc coating.
Metal samples have been randomly assigned to the factor levels, with two replications in each cell. For the data shown here, use the 0.01 level of significance in drawing conclusions from this experiment.
Determine the 95% confidence interval for the population mean for each factor level.
which statistical technique one-way anova regression analysis chi-squared do you suggest to be used to answer this
A standard deviation of $18. Construct and interpret a 90% confidence interval to estimate the mean weekly gasoline expenditure.
question the average price of a gallon of unleaded regular gasoline was reported to be 3.13 in illinois. use this
In a random sample of 22people, the mean commute time to work was 33.1minutes and the standard deviation was 7.3minutes. Assume the population is normally distributed and use a t-distribution to construct a 99%confidence interval for the populatio..
a standard 6-faced die is rolled twice in an experiment. let a and b be the outcome of the 1stnbspand 2ndnbsprolls
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. The researcher will then compare the scores for the two treatments. If there is a difference between the two groups o..
a professor gives tests that are either hard medium or easy. if she gives a hard test her next test will be either
The the steps of hypothesis testing b) sketch the distribution involved, and c) explain your answer to someone who is familiar with the t test for a single sample but not with the t sest for independent means.
two numbers x and y are chosen at random from the interval 0 1. what is the density function of maxxy
If new inspector measures 101 stampings with variance of 0.13 square inch, test at 0.05 level of significance whether inspector is making satisfactory measurements. Suppose normality.
which of the following sampling procedures represents non-probability sampling?a. the researcher obtains a sample of
A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance was s2 = 38.2.
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