Question

On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable time by a noticeably louder sound. The time it takes for the subject to react to this louder sound is recorded. Find the 30th and 75th percentiles for these reaction times.

a) The 30th percentile: 186 milliseconds, The 75th percentile: 269 milliseconds
b) The 30th percentile: 175 milliseconds, The 75th percentile: 311 milliseconds
c) The 30th percentile: 193 milliseconds, The 75th percentile: 250 milliseconds
d) The 30th percentile: 202 milliseconds, The 75th percentile : 273 milliseconds

Answer 1

c) The 30th percentile: 193 milliseconds, The 75th percentile: 250 milliseconds. To find the percentiles, the reaction times need to be arranged in ascending order and the values at the corresponding percentiles need to be determined.

Step-by-step explanation:

The correct answer is option c) The 30th percentile: 193 milliseconds, The 75th percentile: 250 milliseconds.

To find the 30th and 75th percentiles for the reaction times, we need to arrange the reaction times in ascending order and then find the values at the corresponding percentiles.

Given that the 30th percentile is 186 milliseconds and the 75th percentile is 269 milliseconds, neither of the options provided matches these values. Therefore, none of the given options is correct.

Based on the given information, we cannot determine the correct answer from the options provided. The correct answer would have to be found by using the actual data or additional information.