Question

Based on the data, select the most reasonable prediction about the height ofsecond-grade students.A. The typical second-grade student is less than 45 inches tall.B. The typical second-grade student is about 45 inches tall.C. The typical second-grade student is more than 50 inches tall.D. The typical second-grade student is about 48 inches tall.

Answer 1

second-gradeWe are given the following data set:

`44,45,47,49,48,48,49,50,48,52`

We can calculate the mean of this data set, by adding all the terms and dividing by the number of terms, that is 10:

`\text{mean}=(44+45+47+49+48+48+49+50+48+52)/(10)=(480)/(10)=48`

Since the mean is 48 this means that the typical second grade student is 48 inches tall. the right answer would be D.