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A study of Math 1530 students on the first day of class asked the question " How many pairs of shoes do you own?"
Here is a small sample of the answers:
3 2 26 17 9 9 25 23 5 47 40 25
Find the mean and standard deviation of the shoe data
These 64 students will spend a combined total of more tahn $715.21? What is the probability that these 64 students will spend a combined total between $703.59 and $728.45?
x1, x2, x3 are zero mean Gaussian random variables with STD=4. Let x1 and x2 be independent and x3= a*x1+b*x2. Find the constants “a” and “b” such that the correlation between x1 and x3 is 0.3. What is the correlation between x3 and x2?
a journal article reports that a sample of size 5 was used as a basis for calculating a 95 ci for the true average
Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution?
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
Find out the probability
Find the mean, median, mode, and midrange for these data.
What is the expected number of customers that will have to wait more than 6 hours?
The manufacturer would like to establish inventory levels such that there is only a 2.5 percent chance of running out of stock. Where should the manufacturer set the inventory levels?
question let y be a random variable with probability density function gy0.5siny where pi ge y ge 0. let x be a random
How might one know if an error was made in accepting or rejecting the null hypothesis? Do you suppose the nature of the research has an influence on the selection of the significance level? Why or why not?
test the claim that the mean time americans spend watching tv per day is 4.4 hours at the 0.10 level of significance. a
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