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Based on past experience, a telemarketing firm has found that calls to prospective customers take an average of 2.0 minutes, with a standard deviation of 1.5 minutes. The distribution is positively skewed, since persons who actually become customers require more of the caller's time than those who are not home, who simply hang up, or who say they're not interested. Albert has been given a quota of 220 calls for tomorrow, and he works an 8-hour day. Assuming that his list represents a simple random sample of those persons who could be called, what is the probability that Albert will meet or exceed his quota?
Standard deviation of 424 and 155 respectively. at the .05 level of significance, test the claim that the new version has standard deviation equal to that of the past version.
find the minimum shape size n needed to estimate mu find the given values of c s and ec0.98 s9.7 e1assume that the
In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:
What is the probability that a randomly selected mango weighs less than 14 ounces?
what are the components of a decision tree? explain each briefly.please answer in at least 3 sentences but no more than
Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
Assume that a random variable, x, is distributed according to a normal distribution with mean 12 and standard deviation 2. Find the z-value if:
Construct the 95 percent confidence interval for the difference between the two population means.
After calculating the sample size needed to estimate a population proportion to within 0.04, your statistics professor told you the maximum allowable error must be reduced to just .01. If the original calculation led to a sample size of 800, the s..
The statistic has a normal distribution with a standard deviation of 10 gallons. Find the probability that the family's monthly purchases will be between 86and 96 gallons.
suppose an unfair coin comes up heads 36.8 of the time if it is flipped. if the coin is flipped 11 times what is the
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