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The U.S. Census Bureau publishes annual price figures for new mobile homes in Manufactured Housing Statistics. The prices of a sample of 250 new mobile homes have roughly a bell-shaped distribution with mean $63.3 thousand and standard deviation $7.9 thousand.
a. Fill in the blanks: Approximately 95% of the mobile homes in the sample have prices between $_____ thousand and $_____ thousand.
b. Fill in the blank: Approximately _____% of the mobile homes in the sample have prices between $39.6 thousand and $87.0 thousand.
c. Approximately how many mobile homes in the sample have prices between $55.4 thousand and $71.2 thousand? |
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