开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)｜3.2.5(安卓)APP下载

返回

吴奕橦 · 2023年11月04日

请解释公式

  1. Quantitative

NO.PZ2022123001000123

问题如下：

Independent samples drawn from normally distributed populationsexhibit the following characteristics:


Assuming that the variances of the underlying populations are equal, the pooled estimate of the common variance is 2,678.05. The t-test statistic appropriate to test the hypothesis that the two population means are equal is closest to:

选项：

A.

0.94

B.

1.90

C.

0.29

解释：

The t-statistic for the given information (normally distributed populations, population variances assumed equal) is calculated as:


u1-u2；为什么是0

添加评论
1 个答案

星星_品职助教 · 2023年11月06日

同学你好，

本题检验的是两个均值是否相等（test the hypothesis that the two population means are equal）。由此建立原假设为：μ1-μ2=0。直接代入即可。


  • 1

    回答

  • 0

    关注

  • 169

    浏览
相关问题

NO.PZ2022123001000123问题如下 Inpennt samples awn from normally stributepopulationsexhibit the following characteristics:Assuming ththe variances of the unrlying populations are equal, the pooleestimate of the common varianis 2,678.05. The t-test statistic appropriate to test the hypothesis ththe two population means are equis closest to: A.0.94B.1.90C.0.29 The t-statistic for the given information (normally stributepopulations, population variances assumeequal) is calculateas: 这题怎么才能想到用这样的公式呢？

2024-08-04 12:10 1 · 回答

NO.PZ2022123001000123问题如下 Inpennt samples awn from normally stributepopulationsexhibit the following characteristics:Assuming ththe variances of the unrlying populations are equal, the pooleestimate of the common varianis 2,678.05. The t-test statistic appropriate to test the hypothesis ththe two population means are equis closest to: A.0.94B.1.90C.0.29 The t-statistic for the given information (normally stributepopulations, population variances assumeequal) is calculateas: sP的平方不是2678.05的平方吗

2024-01-22 23:19 1 · 回答