A school district will use grade 1-5 students at one el-ementary school to study whether a new reading program can produce better reading comprehension scores. Halfof the students will continue with the current program,and half will receive instruction with the new program.Which is the most appropriate design?A) Completely randomized, randomly assigning studentsto reading programs.B) Randomized blocks, blocked by reading program.C) Randomized blocks, blocked by gender.D) Randomized blocks, blocked by grade level.E) Randomized blocks, blocked by both grade level andgender.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.