1. The weights (kg) of new born baby boys in Great Britain is normally distributed with a mean of 3.68 kilograms and a standard deviation of 0.96kilograms.

1. What is the probability that a randomly selected new born baby boyweighs

lessthan 3.1kg?

1. Find the probability that a random sample of twelve new born baby boysyields

a sample mean lessthan3.1kg.

1. Recently, sports streaming services have grown dramatically. A report showed that households consumed an average of thirty-two hours last week where the standard deviation is 19.68. Assuming its normally distributed. Suppose a researcher analyses the amount consumed by the upper quartile (top 25%) of households last week. Determine the minimum amount consumed last week by households in theupperquartile.