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A television station estimates that 60% of college studentswatch the super bowl. For a sample of 240 students selected at random, what is the mean and variance of the number of students who watch this game?
The self-service prices for a sample of 15 retail outlets during Labor Day weekend of 2007 in the detroit, michigan area. What is the arithmetic mean selling price?
One variable recorded is the count X of finish defects (dimples, ripples, etc) in the car's paint. Is it reasonable to use a binomial distribution?
The Quick Change Oil Company has a number of outlets. The numbers of oil changes at the Oak Street outlet in the past 20 days are: Organize the data into a frequency distribution and include the relative frequency distribution.
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
q1. if you use a 0.10 level of significance in a two-tail hypothesis test what is your decision rule for rejecting a
If the sides of the square are lengthened by 5cm, the area becomes 144cm^2. Find the length of a side of the original square.
Which is the probability of that the median of the sample or average medians be between 320 and 350 minutes?
625 males, 398 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion.
question sadistic tendenciesyou are captured by a russian spy and tortured for information. every time you fail to
You want to prove that a population mean is not 7. Data is ratio and a large sample size will be used (n = 225). When the sample is done the sample mean is computed to be 7.2 and the sample standard deviation is 1.5.
The managers in a company’s East and West regions were rated on the basis of the company’s evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calcu..
you have learned some of the basic terminology of statistics. please propose a study and write a description of the
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