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HRC surveyed a random sample fo 74 Twin Cities construction companies to find information on the costs of their health care plans. One of the item being traced is the annual deductible that employees must pay. The Dept of Labor reports that historically the mean deducible per employee is $502 which Stand Dev of $120. What is the change HRC finds a sample mean between $477 and $527? Calculate the likelihood that the sample mean is between $492 and $512. And what is the probability the sample mean is greater than $550?
A new restaurant with 123 seats is being planned. Studies show that 57% of the customers demand a smoke free area. How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
indicate whether the following statement is true or falsea if the hypothesis hsub0betasub10 is rejectedthen it can be
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
suppose thw weekly amount spent on repairs at a certain computer is normally distributed with a mean of 300 and a
when an instant replay system for tennis was introduced for a tournament men challenged 460 reference calls and 184 of
For the population with standard deviation of σ =10 a score of x=44 corresponds to z= -0.50. Determine the population mean?
Why does the sample size play such an important role in reducing the standard error of the mean? What are the implications of increasing the sample size?
Make a decision about buying machinery. The stakeholders in the simulation have different opinions as to the proper course of action the organization should take.
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
the following regression model has been computed based on a sample of twenty observations 34.2 19.3x. the first
consider the formula used for confidence interval and the elements included in the formula. what happens to the
Below are fertility rates (average children born per woman) in 15 EU nations for 2 years. (a) Make a scatter plot. (b) Find the correlation coefficient and interpret it.
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