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Miles per gallon. In its Fuel Economy Guide for 2008 model vehicles, the Environmental Protection Agency gives data on 1152 vehicles. There are a number of outliers, mainly vehicles with very poor gas mileage. If we ignore the
asked by MAC on September 21, 2011 
statistics
1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. (True/False) b. The graph of a normal distribution is bellshaped. (True/False) c. If a population has a normal
asked by ann on August 20, 2011 
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Which of the following statements is true about the tdistribution with k degrees of freedom? i. the tdistribution is symmetric ii. the tdistribution with k degrees of freedom has a smaller variance than the tdistribution with
asked by Anonymous on May 2, 2007 
statistics
the mean gas mileage for a hybrid car is 56 miles per gallon suppose that the gasoline mileage is approximately normally distributed of 3.2 miles per gallon what is the probability that a randomly selected hybrid gets more than 62
asked by Anoymous on August 22, 2015 
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A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon. You believe the claim is incorrect and find that a random sample of five cars has a mean gas mileage of 19 miles per gallon and a
asked by sue on July 27, 2010

stats
(a) The test had six multiplechoice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed? Explain why or why not. The
asked by Anonymous on September 26, 2016 
stats
(a) The test had six multiplechoice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed? Explain why or why not. The
asked by Anonymous on September 26, 2016 
Math
Fifteen smart cars were randomly selected and the highway mileage of each was noted. The analysis yielded a mean of 47 miles per gallon and a standard deviation of 5 miles per galon. Which of the following would represent a 90%
asked by Arturo on March 29, 2015 
statistic
1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bellshaped. c. If a population has a normal distribution, the mean and
asked by Sonia on August 24, 2011 
Statistics
Which of the following statements are correct? 1.A normal distribution is any distribution that is not unusual. 2.The graph of a normal distribution is bellshaped. 3.If a population has a normal distribution, the mean and the
asked by Christy on July 14, 2010