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The number of cases of tetanus reported in the U.S. during a single month in 1989 has a poisson distribution with a parameter of lambda= 4.5. 1. What is the probability that exactly one case of tetanus will be reported during a given month? 2. What is the probability that at most two cases of tetanus will be reported? 3. What is the porbability that four or more cases will be reported. 4. What is the mean number of cases of tetanus reported in a one month period? What is the standard deviation?
using the standard normal table find the proportions for the areas listed belowa. the area between z 0 and z 2.13b.
in hamilton countyohio the mean number of days needed to sell a house in 86 days. data for the sale of 40 houses in a
consider the experiment of selecting a playing card from a deck of 52 playing cards. each card corresponds to a sample
1) What is correlation? 2) What is an example of two variables that are likely to be correlated because they are both changing over time?
the qwik market amp branding company has found the following results of married people in a taste test of a popular
in a game of chance a number of draws are made with replacement from a box of tickets 500 of these tickets are labeled
Assume that a 2005 poll of 1000 American voters found that 76% of Republicans favored ending the tax on dividend income, as did 42% of Democrats and 54% of Independents.
question the following information is available.h0 mu le 10h1 mu gt 10the sample mean is 12 for the sample
We want 95% confidence that the sample mean is within $5 of the population mean, and the population standard deviation is known to be $63.
the depot is using a standard of 635 hours for a particular modification effort. you are to review the standard and
A recent poll of 700 people who work indoors found that 278 smoke. If the researchers want to be 98% confident of their results to within 3.5 percentage points, how large a sample is necessary?
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
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