Question: he equation above describes a normal distribution for a random variable X. It appears that the time people in the age range of 20 to

he equation above describes a normal distribution for a random variable X. It appears that the time people in the age range of 20 to 50 years spend sleeping is approximately normally distributed with a mean of 7 hours and a standard deviation of 1 hour. Can you estimate the height of this probability density curve at the mean and also give the unit of this value? Give your answer as a proportion, rounding to two decimal places.

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