The proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes was:

0.9 - 0.3 ln (t) (for t > 1).

Find the proportion that remembered the number for 5 minutes. (Round your answer to one decimal place.)

Step-by-step explanation:

The proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes was:

0.9 - 0.3 ln (t)

the proportion that remembered the number for 5 minutes, we would substitute t = 5 into expression, 0.9 - 0.3 ln (t). It becomes

0.9 - 0.3 ln5

= 0.9 - 0.3 * 1.60943791243

= 0.9 - 0.4828

= 0.4172

Approximately 0.4 to 1 decimal place