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Weighing bean seeds. Biological measurements on the same species often follow a Normal distribution quite closely. The weights of seeds of a variety of winged bean are approximately Normal with mean 525 milligrams (mg) and standard deviation 110 mg.
(a) What percent of seeds weigh more than 500 mg?
(b) If we discard the lightest 10% of these seeds, what is the smallest weight among the remaining seeds?
How to get original X variable in terms of the variance-covariance matrix for the regression coefficients pertaining to the transformed x variable? Y^=b0+b1x+b11x^2, x=X-mean(X), we get b0'=b0-b1mean(X)+b11(X^2),b1'=b1-2b1mean(X), b11'=b11
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Defective calculator is 10%. If 10 calculators are selected at random, what is the probability that 4 or more of the calculators will be defective?
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
suppose each of the numbers 1 2 3 4 5 6 7 8 9 and 10 is written on a separate poker chip and placed in a hat. if one
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The mean difference in total cholesterol levels (after - before) was 27.138 mg/dL with a standard deviation of 7.3685 mg/dL. Create a 95% confidence interval for the true average difference in cholesterol levels by the drug.
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