SECT ER 5 NORMAL PROBABILITY DISTRIBUTIONS 29. Gas Prices: New England During a certain week, the mean price of gasoline in the New England region was $3.796 per gallon. A random sample of 32 gas stations is selected from this population. What is the probability that the mean price for the sample was between $3.781 and $3.811 that week? Assume o = $0.045. (Adapted from U.S. Energy Information Administration) 30. Gas Prices: California During a certain week, the mean price of gasoline in California was $4.117 per gallon. A random sample of 38 gas stations is selected from this population. What is the probability that the mean price for the sample was between $4.128 and $4.143 that week? Assume o = $0.049. (Adapted from U.S. Energy Information Administration) 31. Heights of Women The mean height of women in the United States (ages 20-29) is 64.2 inches. A random sample of 60 women in this age group is selected. What is the probability that the mean height for the sample is greater than 66 inches? Assume o = 2.9 inches. (Adapted from National Center for Health Statistics) 32. Heights of Men The mean height

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.