皮皮学，免费搜题
登录
搜题
【单选题】
用简单随机抽样(重复)方法抽取样本单位,如果要使抽样平均误差降低50%,则样本容量需扩大为原来的()倍A.
2
B.
3
C.
4
D.
5
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Best Time Keeper Waldo Wilcox knew there was trouble the moment he saw the mauled(受伤的)deer carcass, not far from one of the meadows where his cattle grazed. His dogs, Dink and Shortie, sensed it too—m...
A.
Y
B.
N
C.
NG
【简答题】阅读理解。 Just a Little Smile Mark was walking home from school one day. He saw the boy in the front drop all of the books he was carrying, with two sweaters, a basketball and a walkman . Mark stopped and...
【简答题】A man was walking along the st r eet when he saw a woman c arrying a large box. It was ha l f i n a n d Half out of her car. So the man went up and said, "The box looks very heavy. Let me give you a h...
【简答题】I. Listening Comprehension (2′*10=20′) Directions: Fill in the blanks with the words you hear. The passage will be read three times. Tom was down on his luck and felt he needed a few drinks. He went t...
【简答题】There was a man who had a little son. H e loved him very much. Every day after work the man would come home and play with the little boy. When the man came home from work one night, he found that he h...
【简答题】将第一次做的九寨页面进行图片使用JQuery的函数进行淡入淡出和添加动画,对文字进行字体大小和颜色的动画效果。在页面最下方添加功能,使用Jquery的函数完成一个简易计算器的功能。
【简答题】材料一 政治上的自由是公共自由,要保障公共自由,就应该避免把权力单独委托给一个人、几个人或少数人,因为一切有权力的人都容易滥用权力,这是万古不易的一条经验。为此,提出一条原则,要防止滥用权力,就必须用权力来约束权力,形成一种能联合各种权力的机制,其中各种权力既调节配合,又互相制约,即权力要分开掌握和使用。 ——孟德斯鸠《罗马盛衰原因论》 材料二 难道农民的儿子生来颈上带着圈,而贵族的儿子生来在腿上...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
