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Mathematics, 28.06.2019 09:40, JeroMii
Asports writer wished to see if a football filled with helium travels farther, on average, than a football filled with air. to test this, the writer used 18 adult male volunteers. these volunteers were randomly divided into two groups of nine men each. group 1 kicked a football that was filled with helium to the recommended pressure. group 2 kicked a football that was filled with air to the recommended pressure. the mean yardage for group 1 was ÂŻ1=300 yards with a standard deviation of =8 yards. the mean yardage for group 2 was ÂŻ2=296 yards with a standard deviation of =6 yards. assume the two groups of kicks are independent. let and represent the mean yardage we would observe for the entire population represented by the volunteers if all members of this population kicked, respectively, a heliumâfilled football and an airâfilled football. assuming twoâsample procedures are safe to use and using option 1 for the degrees of freedom, a 90% confidence interval for â is: (â3.112,11.112) . (â1.82,9.8196) . (â1.848,9.8477) .
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Mathematics, 21.06.2019 19:30, tgentryb60
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Mathematics, 22.06.2019 03:00, amahar4000
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Asports writer wished to see if a football filled with helium travels farther, on average, than a fo...
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