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Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two units of the population mean. Assume a standard deviation of 4.82 in a normally distributed population.
At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?
When 297 college students are randomly selected and surveyed, it is found that 126 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.
In a recent survey, 80% of the citizenry in a community favored the building of a municipal golf course. If you ask 15 citizens about this project, find the probability that
It is believed that population standard deviation is 15 days. If test is conducted using 0.05 level of significance, what conclusion must be reached?
Calculate and interpret a 99% confidence interval for the difference between true means. Is uoride toothpaste beneficial?
What factors in the 1880s exacerbated the fears of southern whites about African-Americans in the South?
From which ancient sources did the concept of a "lost continent" of Atlantis originally derive? What reasons are there for questioning the historical accuracy.
Using an example from a hospital, create a mock data set for two specific variables of importance within hospital (minimum of 20). The data may be used for quality measures, patient inputs, demographics, financial data, etc.
Removing oil from a water/oil mix. In the oil industry, water that mixes with crude oil during production and transportation must be removed.
if the sample mean is 8 the hypothesized population mean is 4 and the population standard deviation is 2 compute the
"Sources of Individual Shy-Bold Variations in Antipredator Behaviour of Male Iberian Rock Lizards" explored the relationship between lizards' physical
1. A random sample of five observations is selected. The deviation scores for the first four observations are -5, 3, 1, and -2.
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