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In the last decade, society in general and the judicial system in particular have altered their opinions on the seriousness of drunken driving. In most jurisdictions, driving an automobile with a blood alcohol level in excess of .08 is a felony. Because of a number of factors, it is difficult to provide guidelines for when it is safe for someone who has consumed alcohol to drive a car. In an experiment to examine the relationship between blood alcohol level and the weight of a drinker, 50 men of varying weights were each given three beers to drink, and 1 hour later their blood alcohol levels were measured. If we assume that the two variables are normally distributed, can we conclude that blood alcohol level and weight are related?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
the director of transportation for big state university has asked for your help in evaluating the usage of one of the
Our bodies have a natural electrical field that is known to help wounds heal. Does changing the field strength slow healing? A series of experiments with newts investigated this question.
since changing this statistics course to a new format i would like to be able to detect an increase of one letter grade
Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
Standard deviation of this poll is 4%. What would be standard deviation if sample size were increased from 83 to 190?
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
q1. a random sample of 50 students at the university of florida revealed the mean number of hours slept last night was
Create a 99% confidence interval estimate of population mean amount of paint included in a 1 gallon can.
Suppose you want to estimate the sample size for a multiple correlation analysis. There are five predictors in your study.
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