Question

2-Sample Tests:

Thirty crew members of this expedition were randomly selected to be studied in each of three different experiments, for a total of 90 crew members randomly selected. A group of 30 volunteers were used, for control groups, in each experiment where 2-samples were used. The goal was to determine if the differences between the experimental and control groups was sufficiently large enough to justify further study or action (neurological, psychological, or physical).

Hypothesis Test 1: Neurological Assessment -> Reaction Time The following are reaction time results for catching an object, with the dominant hand, that is dropped 2 feet above the hand. The two groups are A (the experimental group) and B (the control group). Experimental and Control groups are the same as listed at the beginning of the description of the study. Use the p-value approach, with s = .05.

Group A: = .221 seconds; Standard Deviation = .034 seconds

Group B: = .203 seconds; Standard Deviation = .041 seconds How would I solve this answer creating a null hypothesis?

Answer 1

Let the group A be 1 and group B be 2.

i.e. we can assume homogenity of variance.

Hence we can say that the difference is significant.

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