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It is reasonable to model the number of winter storms in a season as with a Poisson random variable. Suppose that in a good year the average number of storms is 5, and that in a bad year the average is 6. If the probability that next year will be a good year is 0.6 and the probability that it will be bad is 0.4, find the expected value and variance in the number of storms that will occur.
expected value =
variance =
musuppose z is the standardization of x zx-musigma where mu and sigma are the mean and standard deviation of x
in a certain town 10 of the families have no children 10 have one child 40 have two children 30 have three children and
a wildlife study has found that a wolf pack is successful in killing one large animal for every 12 that it chases.a
The weights of canned hams processed at Henline Ham Company follow the normal distribution, with a mean of 9.20 pounds and a standard deviation of .25 pounds. The label weight is given as 9.00 pounds
a key aspect to applying an x and r-chart model to a variable quality measure is the concept of chance and assignable
The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $20.. A random sample of 100 workers in this industry has a mean daily wage of $116.
Your regional manager is impressed with how you've employed spreadsheets to aid your small company in saving time and more accurately figuring out payroll amounts.
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
Sample Mean Distribution and T-Interval
specimens of blood from 10 different animals were analyzed for blood count say y in units of 100 and packed cell volume
how can you do a regression analysis on excel to predict your sales for the next 5
1.for small samples t intervals are z intervals based on the same data set.a.narrower thanb.the same asc.wider than2.i
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