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IQ data is thought to be normally distributed with a mean of 100 and a standard deviation of 15. Using the emperical rule, what is the IQ range we would expect approximately 95% of the population to be?
1 a random sample of 60 college graduates results in a mean time to graduate of 4.58 years with a standard deviation of
Write the null and alternative hypotheses and calculate the test statistic, determine the critical value whether or not there has been an improvement.
Identify whether it is an experiment or an observation study/survey. If experiment: identify experimental design, experimental units, factors & levels, response variable, and blocks (if any).
What is the number of personnel records that should be sampled, at minimum, to satisfy the requirements?
a car rental agency at a local airport has available 5 fords 7 chevrolets 4 dodges 3 hondas and 4 toyotas. if the
the sample of test scores is given below. create a relative frequency histogram of the data with 5 classes. describe
Find the roots of the quadratic equation:z^2-4z-12=0. (If there is more than one root, separate them with commas.)
A rectangular field has to be formed with a given total fence length of P meter of fence material. Find the dimensions of the rectangle which will maximize the fenced area.
which of the 95 confidence intervals below give you justification in thinking that your sample was drawn from a
in a poll of 600 voters in a campaign to eliminate non-returnable beverage containers 210 of the voters were opposed.
is the average number of television watched per evening in australia less than in britain? null and alternative
1. Using the Internet resources, find an example of a linear optimization model used in industry. Describe which industry it is or was used in and briefly discuss the problem or challenge it addressed.
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