问答题 心理学有哪些主要的研究方法？这些方法的特点是什么？你对“心理学是一门实验科学”有什么新的认识？

问答题 某牛奶加工厂生产一种容量1000毫升的盒装牛奶。随机取样50盒，测得平均容量为986毫升，标准差为12毫升。若要求根据这些数据判断该厂牛奶的容量是否合乎规格，问：检验结论可能犯的两类错误分别是什么？两类错误造成的后果又将是什么？

单项选择题 Rosie inherits 1,000 shares of Northern Skies Airline Corporation stock from the estate of her Uncle Tony.Tony died on July 2, 2018.The stock's value on July 2, 2018, is $4,000.Tony's basis in the stock was $3, 000.The stock has a fair market value of $7,000 on October 1, 2018, when it is transferred to her.Rosie sells the stock October 11,2018.What is Rosie's basis in the stock?( )：A.$0B.$1,000C.$3,000D.$4,000E.$7,000