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Packages from packing machine have a mass, which is normally distributed with mean 200g and standard deviation 2g. Find the probability that the package from the machine weighs
a) less than 197g b) more than 200.5g
(use standard normal variable Z and normal distribution tables)
How many of the 15 students would you expect to correctly identify Coke or Pepsi? What is the probability that exactly 10 students surveyed will correctly identify coke or Pepsi.
A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
you work for a consumer watchdog publication and are testing the advertising claims of a light bulb manufacturer. the
Its mean is 139 and its standard deviation is 12. Approximately how many terms can you expect to find between the values of 115 and 163?
Your manager, who just read an abridged version of a statistics book, wants you to test hypotheses for the difference in two population means.
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
describe the importance of tchebysheffs theorem to the ability to find bounds of
A political scientist obtained recordings of election-night acceptance speeches of seven newly elected representatives to the US Congress.
we all know that utilitarianism seeks the good for the majority of people. based on what you learned from chapter 2 we
At the 0.01 level of significance, is there evidence to support the professor's claim?
The student newspaper on our campus was interested in binge drinking. For their article, they surveyed 50 fraternity members, and found they drink more than 5 drinks an average of 7 times per month.
After a bumper crop, a mushroom grower hypothesizes that mushrooms will remain at the average wholesale price of $1 per pound. State the null hypothesis and the alternative hypothesis.
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