请教:两组数据平均值相减,标准偏差怎么算# Biology - 生物学
n*e
1 楼
有2张在用的,一张是日常生活买菜加油之类的,一个月也就1000-2000的经常性开销。
今天看到账户里有这样的显示:
Account Alert: A review of this account has shown recent high- risk activity
. Please contact our Customer Service Unit.
我觉得很神经啊,自己看过几个月的所有支出,都是小额的生活支出,没有任何异常之
处。
然后有一个通知:
Your Choices to Limit Information
Sharing & Marketing
To limit disclosures of personal information about you,
or to limit marketing offers by our affiliates, as
described in this notice, you can call us toll free at the
Customer Service number shown on your billing sta
今天看到账户里有这样的显示:
Account Alert: A review of this account has shown recent high- risk activity
. Please contact our Customer Service Unit.
我觉得很神经啊,自己看过几个月的所有支出,都是小额的生活支出,没有任何异常之
处。
然后有一个通知:
Your Choices to Limit Information
Sharing & Marketing
To limit disclosures of personal information about you,
or to limit marketing offers by our affiliates, as
described in this notice, you can call us toll free at the
Customer Service number shown on your billing sta