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About 80% of young adult Internet users (age 18 to 29) in a certain locale use social networking sites. The sample proportion for this population would follow approximately a Normal distribution with what mean and standard deviation for a random sample taken from this population of size 1000?
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make? Please provide step by step solution.
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard dev..
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
The average credit card debt for college seniors is $3,262. If the debt is normally distributed with a standard deviation of $400, find probabilities. that the senior owes at least $1,000
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
Give an example representing a discrete probability distribution and a continuous probability distribution. Explain why your choice is discrete and continuous.
Three are selected, at random, without replacement from the batch. What is the probability that the third is not defective given that one of the previous two are defective?
What is the decision regarding the null hypothesis (is there a difference in the mean numbers of cameras sold at the three department store chains)?
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
Determine the rejection region for the test of Ho: (mean 1 - mean 2) > 2.43 Use a = 0.04. z >
Calculate the value of Pearson correlation. Illustrate what information is provided by the numerical value of the Pearson correlation.
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