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Mathematics, 08.04.2021 19:00 lalllda
The design of controls and instruments affects how easily people can use them. A student
project investigated this effect by asking 25 right-handed students to turn a knob (with their
right hand) that moved an indicator. There were two identical instruments, one with a right-
hand thread (the knob turns clockwise) and the other with a left-hand thread (the knob must be
turned counterclockwise). Each of the 25 students used both instruments in a random order.
The following table gives the times in seconds each subject took to move the indicator a fixed
distance. Note that smaller times are better.
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Answers: 2
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The design of controls and instruments affects how easily people can use them. A student
project in...
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