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​

Why it's time to lay the stereotype of the 'teen brain’ to rest 1. part a: which statement identifies the central idea of the text? a experts have spent time researching how different the teenage brain is from adults’ brains, when they are actually more similar than different. b teenagers often engage in risky behavior to fulfill the narrative they have been told about how teenagers are supposed to behave. c explanations for why teenagers engage in risky behavior have been overly focused on brain development, rather than their natural need to explore the world. d teenagers’ risky behavior is influenced by the combined effects of their hormone levels and their brain development.