SOLUTION: 3) using the formula R=0.17 + 0.44 log N, determine how many choices would result in a reaction time of 0.42 seconds. Round your answer to the nearest whole number. I started the

Question 56100: 3) using the formula R=0.17 + 0.44 log N, determine how many choices would result in a reaction time of 0.42 seconds. Round your answer to the nearest whole number. I started the formula as:
.42=0.17 + 0.44 log N
Found 2 solutions by stanbon, rapaljer:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
using the formula R=0.17 + 0.44 log N, determine how many choices would result in a reaction time of 0.42 seconds. Round your answer to the nearest whole number. I started the formula as:
.42=0.17 + 0.44 log N
0.42-0.17 = 0.44log N
0.25=0.44log N
log N = 0.56818181...
N=10^0.56818181...
N=3.699830414...
Cheers,
Stan H.

Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
.42=0.17 + 0.44 log N

Subtract 0.17 from each side:
.42-.17 = 0.44 log N
.25= 0.44 log N

Divde both sides by .44

.568 = log N

To "undo" log, raise both sides to the 10 power, which is

N= 3.6998, which rounded to the nearest whole number is 4.

R^2 at SCC
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