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Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was 3 years with a standard deviation of 1.8 years. Suppose that it is somehow known that the population standard deviation is 1.5. Conduct a hypothesis test to determine if the mean length of jail time has increased. The distribution of the population is normal.
Is the population standard deviation known and, if so, what is it?
the typical amount of sleep per night for undergraduate college students has a bell shaped distribution with a mean of
Table 7.17 is from a General Social Survey. White subjects in the sample were asked: (B) Do you favor busing (Negro/Black) and white school children from one school district to another?, (P) If your party nominated a (Negro/Black) for President, w..
Write an equation of the plane tangent to the surface S given by x = u^2 + v, y = u + v^2, z = uv, ((u,v)?R^2) at the point P with u = 2, v = 1.
The pennstate2 dataset on the companion website includes heights and the total number of ear pierces for each person in a sample of college students.
Calculate the chi-square statistic χ2 to determine if there is enough evidence to conclude that the number of minutes spent online per day is related to gender.
Now imagine repeating the survey many, many times, each time recording a different sample mean commute distance. In the long run, a histogram of these sample means represents?
How did the coup d'etat in Guatemala impact later events? Provide examples/details from Harvest of Empire.
a study of peach trees found that the average number of peaches per tree was 825. the standard deviation of the
General motor skills of children with a developmental disorder. Lopata, Hamm, Volker, and Sowinski (2007) studied the general motor and visual skills.
An experiment designed to change attitudes about binge drinking is to be performed using college students as subjects.
What is the matching principle? Explain and detail what methods of accounting and what types of assets most easily conform to the matching principle.
What is wrong with the following inference, and write a correct inference: "We proved that Harry cannot tell the difference between cotton and rayon fabrics.
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