Re: [計量] pp1 請教
原題有12個數據：
7.51、8.22、7.86、8.36、8.09、7.83
8.30、8.01、7.73、8.25、7.96、8.53
請問這個怎麼得來的?
※ 引述《ahold (Saatch aur Himmat.)》之銘言：
: 原題有12個數據：
: 7.51、8.22、7.86、8.36、8.09、7.83
: 8.30、8.01、7.73、8.25、7.96、8.53
: 看有幾個在"1.5"個標準差的範圍內就好了
: 所以要在7.65～8.55的範圍內！
: 答案是11個沒錯吧？
: ※ 引述《a2515125 (Bobshih)》之銘言：
: : A vending machine is designed to dispense 8 ounces of coffee into a cup.
: : After a test that recorded the number of ounces of coffee in each of 1,000
: : cups dispensed by the vending machine, the 12 listed amounts, in ounces,
: : were selected from the data. If the 1,000 recorded amounts have a mean
: : of 8.1 ounces and a standard deviation of 0.3 ounce, how many of the 12
: : listed amounts are within 1.5 standard deviations of the mean?
: : (A) Four
: : (B) Six
: : (C) Nine
: : (D) Ten
: : (E) Eleven
: : 請問這題如何解?
: : SD=0.3
: : Mean=8.1
: : 範圍7.8~8.4
: : 然後呢~"~
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