Answer:
represent the number of non-fatal accidents involved the use of a cell phone
represent the sample size
And we want to find a point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell phone and we can use the following formula:
![\hat p=\frac{X}{n}](https://tex.z-dn.net/?f=%5Chat%20p%3D%5Cfrac%7BX%7D%7Bn%7D)
And replacing we got:
![\hat p=\frac{189}{400}=0.4725](https://tex.z-dn.net/?f=%20%5Chat%20p%3D%5Cfrac%7B189%7D%7B400%7D%3D0.4725)
Step-by-step explanation:
For this problem we have the following info given:
represent the number of non-fatal accidents involved the use of a cell phone
represent the sample size
And we want to find a point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell phone and we can use the following formula:
![\hat p=\frac{X}{n}](https://tex.z-dn.net/?f=%5Chat%20p%3D%5Cfrac%7BX%7D%7Bn%7D)
And replacing we got:
![\hat p=\frac{189}{400}=0.4725](https://tex.z-dn.net/?f=%20%5Chat%20p%3D%5Cfrac%7B189%7D%7B400%7D%3D0.4725)