一道英文统计题a box contains 10 tickets.each ticket is marked with a whole number between -5 and 5.The numbers are not all the same;their average equals 0.(a) 100 draws are made from the box,and you win $1 if the sum is between -15 and 15(B) 1
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![一道英文统计题a box contains 10 tickets.each ticket is marked with a whole number between -5 and 5.The numbers are not all the same;their average equals 0.(a) 100 draws are made from the box,and you win $1 if the sum is between -15 and 15(B) 1](/uploads/image/z/13168942-70-2.jpg?t=%E4%B8%80%E9%81%93%E8%8B%B1%E6%96%87%E7%BB%9F%E8%AE%A1%E9%A2%98a+box+contains+10+tickets.each+ticket+is+marked+with+a+whole+number+between+-5+and+5.The+numbers+are+not+all+the+same%3Btheir+average+equals+0.%28a%29+100+draws+are+made+from+the+box%2Cand+you+win+%241+if+the+sum+is+between+-15+and+15%28B%29+1)
一道英文统计题a box contains 10 tickets.each ticket is marked with a whole number between -5 and 5.The numbers are not all the same;their average equals 0.(a) 100 draws are made from the box,and you win $1 if the sum is between -15 and 15(B) 1
一道英文统计题
a box contains 10 tickets.each ticket is marked with a whole number between -5 and 5.The numbers are not all the same;their average equals 0.
(a) 100 draws are made from the box,and you win $1 if the sum is between -15 and 15
(B) 100 draws are made from the box,and you win $1 if the sum is between -30 and 30
以上两种选择应该选哪个获利多?为什么?
一道英文统计题a box contains 10 tickets.each ticket is marked with a whole number between -5 and 5.The numbers are not all the same;their average equals 0.(a) 100 draws are made from the box,and you win $1 if the sum is between -15 and 15(B) 1
B的选择获利多.
因为B选择包含了A选择的情况.