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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.
Sketch a graph of the situation. Label the horizontal axis. Mark the hypothesized mean and the sample mean x. Shade the area corresponding to the p-value.
a population of 100 healthy men was followed for the development of prostate cancer as described herein after being
(a) State the appropriate hypotheses in this case, defining any parameters you use. (b) Somehow the p-value did not get printed. Use the Vassar applet to compute the p-value. (c) Carefully state your conclusions based on these data. Use a level of si..
these data are observations collected using the completely randomized designnbspnbspsample 1nbspnbspnbspnbspsample
Find the 98% confidence interval for the population mean score of the current class.
Using a level of significance of .01, is there evidence that the first year female high school teachers are receiving lower salaries? Fully explain your answer.
of the three levels of strategy that are part of an organizations decision-making hierarchy which level develops annual
The histograms show the distribution of the percentages of graduates who, 9 months after graduating, have obtained jobs that require a law degree.
Provide analysis for 2 quarters-1. January-March 2016; 2. April-June 2016-what is the average number of days from initiated to completed (include all)-provide 2 colorful graphs showing the number of calendar days
For each of the following scenarios, write the desired probability in a format such as P(X = 10) and specify n and p. Do not actually compute the desired.
Depict the situation as a game with incomplete information, in which each type of each player is indexed by the number of e-mail messages he has received.
Scores for men on the verbal portion of the SAT test are normally distributed with a mean 509 and a standard deviation of 112. Randomly selected men are given the Columbia
with a mean of 74 and standard deviation of 16. what is the proportion of healthy people will have cbf readings between
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