The distribution of reading scale scores in the 4 th 4 th 4, start superscript, start text, t, h, end text, end superscript grade at truman elementary school was approximately normal with mean μ = 221 μ=221mu, equals, 221 and standard deviation σ = 36 σ=36sigma, equals, 36. educational researchers are conducting an intervention experiment. to participate in the experiment, a student must have a reading scale score in the lower 50 % 50p, percent of the scores in their grade level. what is the maximum reading scale score for students to participate in the intervention experiment? choose 1 answer: choose 1 answer:
(choice a) a 185 185185
(choice b) b 203 203203
(choice c) c 221 221221
(choice d) d 239 239239
(choice e) e 257 257