Intervalo LRC
XE
HI
Halla la media
aritmética para
los datos agrupados
en la anterior tabla
1 211 - 214
2
215 - 218
3
219 - 222
223 - 226
4
3
227 - 230
10
231-234
10
7
235 - 238
12
19
243 - 246
247-250
Para esto hallamos la surmatoria del producto de las marcas
de clase con las frecuencias absolutas
=
Ef* Xi
n​

Student drivers are required to keep a log of their supervised driving hours. However, not all students are diligent in their record-keeping.

Explanation:

However is used to present us another statement that in some way contradicts something that was said in the previous one, partially or in the whole. In the given sentences in the first, it is claimed that students must keep a log of their supervised driving hours, yet in the second one there is a statement that not all students follow that rule. So, we have a contradiction between these two statements and using this transition we connect them accurately.