Questões de Concurso Público PC-DF 2021 para Agente de Polícia da Carreira de Polícia Civil do Distrito Federal
Foram encontradas 12 questões
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/7d278b21cd59e7a6c5f1.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/5d7899035f3e277c3489.png)
O valor esperado da média amostral é igual a b/2.
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/7d278b21cd59e7a6c5f1.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/5d7899035f3e277c3489.png)
e S² são estatísticas não correlacionadas.
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/7d278b21cd59e7a6c5f1.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/5d7899035f3e277c3489.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/7d278b21cd59e7a6c5f1.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/5d7899035f3e277c3489.png)
Se µ denota a média populacional, então segue uma
distribuição t de Student.
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/7d278b21cd59e7a6c5f1.png)
![](https://s3.amazonaws.com/qcon-assets-production/images/provas/83336/5d7899035f3e277c3489.png)
A variância de é igual a S².