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The ages of a group of 131 randomly selected adult females have a standard deviation of 18.9 years. Assume that the ages of female statistics students have less variation than ages of females in the general? population, so let sigmaσ=18.9 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics? students? Assume that we want 95?% confidence that the sample mean is within? one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general? population?
Construct a frequency distribution of the scores.- Construct a histogram of the frequency distribution constructed in part a.
One CI has a confidence level of 95%, and the other has a confidence level of 99.9%. Match the confidence level with the confidence interval, and justify your answer.
a. Construct a frequency distribution table. b. Construct a histogram and interpret the histogram.
A market research firm conducts telephone surveys with a 44% historical response rate. What is the probability that in a new sample of 400 telephone numbers
Are based on a report of a Field poll printed in the Sacramento Bee on July 7, 2000 (Dan Smith, p. A4), with the headline, "Ratings Up for Boxer, Feinstein.
a biologist is studying the gestation period of domestic dogs. fifteen dogs are observed during pregnancy and are found
Runzheimer International publishes data on overseas business travel costs. They report that the average per diem total for a business traveler in Paris, France.
Form a transition matrix for this process taking as states F, 1, 2, 3, 4, and G where F stands for flunking out and G for graduating, and the other states represent the year of study.
it is known that 30 of all customers of a major credit card pay their bills in full before any interest charges are
Construct a scatter plot from a given set of data and write a regression equation to predict a value not given in the data set.Solve the following:Consider the following data that compares the Consumer Price Index (CPI) with subway fare in a particul..
Explain how these statistics indicate that lung condition and smoking are not independent.- What's the probability that a randomly selected 60-year-old has this lung condition?
The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
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