The school board administered a reading test to all eighth-grade students at High Achievers Charter School and determined that 10 percent of them were reading below grade level.
Based on this data, which of the following conclusions are valid?

a) 10 percent of all students at HACS are reading below grade level.
b) 10 percent of all eighth-grade students at HACS are reading below grade level.

b) 10 percent of all eighth-grade students at HACS are reading below grade level

Step-by-step explanation:

The sample is eight-grade students at High Achievers Charter School at a particular time and this forms a part of the total population of eight-grade students in the school. So we can conclude that for every eight-grade class in the school, 10% are reading below grade level.

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step-by-step explanation: