If two variables, X and Y, have a strong linear relationship, then
A.There may or may not be any causal relationship between X and Y
B.X causes Y to happen
C.Y causes X to happen
D.None of these alternatives is correct
正确答案:There may or may not be any causal relationship between X and Y
点击查看答案
进入小程序搜题
你可能喜欢
A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the
点击查看答案
进入小程序搜题
Exhibit 2 The following represents the probability distribution for the daily demand of computers at a local store.
点击查看答案
进入小程序搜题
The student body of a large university consists of 60% female students. A random sample of 8 students is selected. What is the probability that among the students in the sample exactly two are female?
点击查看答案
进入小程序搜题
A weighted average of the value of a random variable, where the probability function provides weights is known as
点击查看答案
进入小程序搜题
A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is
点击查看答案
进入小程序搜题
From a population of 500 elements, a sample of 225 elements is selected. It is known that the variance of the population is 900. The standard error of the mean is approximately
点击查看答案
进入小程序搜题
Given the following information:Standard deviation = 8 Coefficient of variation = 64%The mean would then be
点击查看答案
进入小程序搜题
In what type of test is the variable of interest the difference between the values of the observations rather than the observations themselves?
点击查看答案
进入小程序搜题
When a false null hypothesis is not rejected, the researcher has made a
点击查看答案
进入小程序搜题
A.are established correctly
点击查看答案
进入小程序搜题
赞题库
赞题库-搜题找答案
(已有500万+用户使用)
历年真题
章节练习
每日一练
高频考题
错题收藏
在线模考
提分密卷
模拟试题
无需下载 立即使用
手机版
电脑版
版权所有©考试资料网(ppkao.com)All Rights Reserved