The United States Energy Information Administration generated an August 2010 rep

Question

The United States Energy Information Administration generated an August 2010 report including information on primary energy production by source. The data shown is the amount of energy produced by natural gas plant liquids (measured in quadrillion British thermal units) per year from 1970-1990. In a frequency histogram of this data, what would be the height of the bar associated to the class 2.3 - 2.4QBtu? ount of energy produced ar by crude oil (quadrillion British thermal units) 1970 2.512 1971 2.544 1972 2.598 1197312569 1974 2.471 1975 2.374 1976 2.327 1977 2.327 1978 2.245 1979 2.286 1980 2.254 1981 2.307 1982 2.191 1983 2184 1984 2.274 1985 2.241 1986 2.149 1987 2.215

Explanation / Answer

In the years 1975, 1976, 1977 and 1981, the energy produced is between 2.3 and 2.4 QBtu

So, the height of the frequency histogram for the class 2.3-2.4 QBtu = Number of years in which energy produced is inside this range = 4

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