xvnjcke的部落格

標題:

Urgent Questions(15) ^_^

發問:

Show the steps very clearly. Tell me why also.1. The mean of 10 data is calculated to be 48.7, with a datum 45 wrongly entered as 55. What is the correct mean of the 10 data?2. If the mean, mode and median of two sets of data are the same, which of the following are true?(i) All the data in both sets are the... 顯示更多 Show the steps very clearly. Tell me why also. 1. The mean of 10 data is calculated to be 48.7, with a datum 45 wrongly entered as 55. What is the correct mean of the 10 data? 2. If the mean, mode and median of two sets of data are the same, which of the following are true? (i) All the data in both sets are the same. (ii) Two sets of data contain same number of data. (iii) Both frequency curves of the two sets of data are symmetric. 更新: 1. Why? 更新 2: I do not know whether I am correct or not? 1. (x + 45)/10 = 48.7 x = 49.7 Please response! 更新 3: Now, I understand!

最佳解答:

• 找一首純音樂(學過鋼琴的幫我!!!)
• 未啥cs有不同的殭屍(急)!!!
• 關於吉拿偈巴士
• 幫我分析一下今年嘉南地區夜間部護理類一的最低分數
• 請問高雄哪裡有再賣公雞牌的鞋子呢---
• 急~請問錢櫃(中華新館)消費
• 如何查老榮民原始大陸戶籍呢？
• 求~台北行程+美食推薦
• 想把自然捲的瀏海抓的亂亂的
• 請問高雄縣哪個動物醫院比較便宜也比較好呢-

此文章來自奇摩知識+如有不便請留言告知

1. Let x be the sum of the remaining nine correct data. Then, (x + 55) / 10 = 48.7 x = 432 So the correct mean of the 10 data = (432 + 45) / 10 = 47.7 2i) False ii) False eg (1,3,5,5,5,7,9) and (5,5,5) are two sets of data having the same mean, mode and median. But the total number of data are different and not all the data are the same. iii) False. The frequency curve is symmetric if and only if it is normal distribution (i.e. mean=mode=median) . However, the mean, median and mode of each set of data are not necessarily the same in this case.

其他解答:31C9A75CB3B14398