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It is believed that a typical family spends 35% of its income on food and groceries. A sample of eight randomly selected families yielded the following data.
30 29 39 49 36 33 37 35
Test the hypothesis that the median percentage of family income spent for food and groceries is 35 against the alternative that it is less than 35. Use α = 0.05.
Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X.
How certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned?
let x and y be independent geometric distributions. u minxy v x - ya show that u and v are independentb find the
q1. suppose the monthly percentage changes in the tse 300 index from 1980 to 2000 are normally distributed with a
Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of � 0.03 grams with 90 percent confidence?
consider a random sample of size n from a bernoulli distribution xi bin1p. for a uniform prior density p unif01 and
using the standard normal table find the proportions for the areas listed belowa. the area between z 0 and z 2.13b.
Determine the least squares equation. On the basis of this information, what are the estimated sales for 2005?
a marine biologist claims that the mean length of mature female pink seaperch is different in fall and winter. a sample
A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation of 20 gigabytes. What is the standard error of the mean?
Describe and analyze your quantitative data and Briefly address the data analysis process.
Calculate the 95% confidence interval for the number of admissions at the hospitals based on your sample of 50 and explain what the confidence interval represents in the context of the problem.
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