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A student has been assigned 12 textbooks: 3 for math, 5 for music, 4 for biology. She decides to keep all her books on one shelf. If she keeps them separated by topic, in how many different ways can she arrange her bookshelf?
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
1.a forester wishes to predict the volume in cubic feet of usable lumber in a certain species of tree using the height
If 20 voters are selected at random, and X is the number of voters which support this referendum, determine the mean and variance of X.
Let's say I have a new drug that I think helps diabetics. So I perform clinical trials in accordance with the FDA requirements. I give one randomly selected groups of diabetics the drug, and another sample gets a placebo pill.
What would the observational units be in this case? Fall, 2008 (d) What are the observational units in your time management study?
denote by a b and c the events that a grand prize is behind doors a b and c respectively. suppose you randomly picked a
What is the probability of randomly selecting a male from this group?
What is the probability that there are less than 500 nails in a randomly selected five pound box of nails?
a) What is the distribution and parameter(s) for N and for S?
High precision titanium spheres are popular components in manufacturing of ball bearings. A factory has ordered a shipment of 5000 titanium spheres from aboard. It is found that the shipment has a mean radius of 1.5 cm with a standard deviation ..
Assume a sample of 25 women is needed for the study. What type/s of method/s of random selection can you use to determine which women should be asked to participate in the study?
Given the same sample mean and the same sample size which confidence interval estimate would be larger and why: One with a 90% confidence level or one with a 95% confidence level?
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