A sleep time of 15.9 hours per day for a newborn baby is at the 10h percentile of the distribution of sleep times for all newborn babies. Assuming the distribution is normal with a standard deviation of 0.5 hour, approximately what is the mean time, in hours per day, for newborn babies? A. 15.1 B. 15.3 Ğ¡. 16.3 D. 16.5 E. 16.7

The mean time in hours per day for newborn babies is 16.5 hours ⇒ DStep-by-step explanation:A sleep time of 15.9 hours per day for a newborn baby is at the 10thpercentile of the distribution of sleep times for all newborn babiesAssuming the distribution is normal with a standard deviation of 0.5 hourTo find the mean time let us do that1. Use the normal distribution table to find the corresponding z-score    for 10th percentile2. Use the rule μ = x - zσ, where μ is the mean, σ is the standard     deviation and x is the score3. Substitute the values of x, σ and z in the rule to find μLook to the normal distribution table to find z-score that equivalent to the area = 10/100 = 0.1 (10th percentile)∵ z-score = -1.28∵ σ = 0.5 hour∵ x = 15.9∵ μ = x - zσ- Substitute the values in the rule∴ μ = 15.9 - (-1.28)(0.5)∴ μ = 15.9 + 0.64∴ μ = 16.54 ≅ 16.5 hoursThe mean time in hours per day for newborn babies is 16.5 hoursLearn more:You can learn more about the normal distribution curve in brainly.com/question/8799684#LearnwithBrainly