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A sample of 28 student scores on the chemistry midterm exam is shown. (a) At α = .10, does the population median differ from 50? Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality? Explain.
Chemistry
74 60 7 97 62 2 1005 99 78 93 32 43 6487 37 70 54 60 62 1726 45 84 24 66 7 48
The ACT is also distributed with meanof 21 and standard deviation of 4.7. Rachel wants to be in the 98th percentile on each test. What scores must she recieve on each exam?
Construct a 99% confidence interval estimate for the population mean amount of paint included in a 1-gallon can.
Write complete linear programming model (All three parts) to find out the number of items to be transported from models A, B, C, and D to nodes 1 and 2 at minimum cost.
Determine the p-value; and at 95% confidence, test the above hypotheses.
A random-effects ANOVA refers to the analysis where the levels included in the study represent a random sample of all levels that exist.
Carry out the suitable hypothesis test, at alpha = .05, to find out whether there is a relationship between school/work and stress.
Given that we have collected pairs of observations on two variables X and Y , we would consider fitting a straight line with X as an explanatory variable if:
Each F-distribution is identified by two numbers of degrees of freedom, one for each of the two samples involved.
If sample mean is M=44. Is this sufficient to demonstrate significant effect? Again assume a Two-tailed test with a=0.05.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
How large could a tumor grow before a researcher might consider it to be an outlier and would want to double check the measurement.
The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp b) Compute and interpret the machine Cpk
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