The time required for a citizen to complete the 2010 u. s. census ""long"" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. what is the third quartile (in minutes) for the time required to complete the form?

46.75 minutes

Step-by-step explanation:

Mean time (μ) = 40 minutes

Standard deviation (σ) = 10 minutes

The third quartile is at the 75th percentile of a normal distribution. According to a z-score table, the corresponding z-score for the 75th percentile is z=0.675.

The z-score for any given time, 'X', is:

The third quartile for the time required to complete the form is:

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: