12. A soft-drink manufacturer claims that its 12-ounce cans do not contain, on average, more than 30 calories. A random sample of 64 cans of this soft drink, which were checked for calories, contained a mean of 32 calories with a standard deviation of 3 calories. A) Does the sample information support the alternative hypothesis that the manufacturer's claim is false? Use a significance level of 5%. B) Based on your decision, which type of error could the sample data have led you to make?

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Q: 16. If E(X) = 5 and E(Y) = 4, then E(XY) = 20. O TRUE O FALSE *

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