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A psychologist performed an experiment on participants who used a computer program designed by the psychologist to assess spatial reasoning. The longer a participant used the computer program, the more data the psychologist received from the participant.
To entice participants to spend time using the computer program, the psychologist paid each participant $4.40
for each hour the participant used the computer program in addition to $10.45
for taking part in the experiment. Thus, a participant who used the computer program for x
hours was paid a total of 4.40x + 10.45 dollars.
The mean time spent on the computer program by the participants was
34 hours, and the standard deviation of the times was 10 hours.
Question.
1. What was the mean (in dollars) of the payments to the participants? Do not round your response.
2. What was the standard deviation (in dollars) of the payments to the participants? Do not round your response.