[機統] 請問一題統計
A lumber company has claimed that the standard deviation for the lengths of
their 6 foot boards is 0.5 inches or less. To test their claim, a random
sample of 17 six- foot boards is selected; and it is determined that the
standard deviation of the sample is 0.4. Do the results of the sample
support the company's claim? Use α = 0.1.
Answer: Since X^2 = 25 > 23.54, reject Ho
p-value is between .05and0.10
請問 為什麼X^2是25阿
我怎麼算都是10.24 可是好多地方的解答都是25
感謝
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