[商管] [統計]-卡方適合度檢定和檢定取樣本問題
第一題
下面資料是各個年齡層購買球賽門票的資料
試以卡方適合度檢定分配呈常態分布 alpha = 0.05
年齡區間 頻率
10-20 16
20-30 44
30-40 61
40-50 56
50-60 35
60-70 19
這題沒有給平均也沒給變異
就算分成八等份也不知道要怎麼下手= =
第二題
The manufacture manager in the CocaCola Company suspected that the new
bottling process produces under-filled cans of caca-cola. Based on the most
recent collected data of 100 cans of regular 12-oz Coca-Cola, the sample mean
is 11.95 oz and the sample standard deviation is 0.1 oz.
When testing H0: u=12 oz vs. H1: u<12 oz, what is the minimum sample size
needed to guarantee that the power of the test will be at least 90%
in order to detect the true u=11.98 at alpha = 0.05?
題目裡面有寫到的u都是母體期望值
S(Zalpha + Zbeta) 2
這題如果我題目沒會錯意的話應該是要求n= (－－－－－－－－－－)
11.98-12
如果有錯請糾正@@
我想問一下alpha和beta怎麼求@@
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 122.116.5.38
※ 編輯: bboylu 來自: 122.116.5.38 (10/31 02:17)
推
10/31 11:24, , 1F
10/31 11:24, 1F
→
10/31 11:24, , 2F
10/31 11:24, 2F
→
10/31 11:26, , 3F
10/31 11:26, 3F
推
10/31 11:30, , 4F
10/31 11:30, 4F
→
10/31 11:32, , 5F
10/31 11:32, 5F
→
10/31 13:41, , 6F
10/31 13:41, 6F