Sample Population 日 Histogram a normal distribution curve 口 the area of the bars口 The area under the curve 日 Cumulative relative日 The cumulative probability frequency In the population 口 in the sample,the d Generally speaking the proportion of the boys chance that a boy of aged of age 12 that are lower 12 is lower than a than a specified height. specified height if he grow normall8 Sample & Population  Histogram-  the area of the bars  Cumulative relative frequency  in the sample, the proportion of the boys of age 12 that are lower than a specified height.  normal distribution curve  The area under the curve  The cumulative probability.  In the population.  Generally speaking, the chance that a boy of aged 12 is lower than a specified height if he grow normally