1- Assume that adults have IQ scores that are normally distributed with a mean of 103.8 and a standard deviation 15.6. Find the first quartile Q1?, which is the IQ score separating the bottom?25% from the top?75%. The first quartile is

2- Engineers want to design seats in commercial aircraft so that they are wide enough to fit 99?% of all males.?(Accommodating 100% of males would require very wide seats that would be much too?expensive.) Men have hip breadths that are normally distributed with a mean of 14.5 in. and a standard deviation of 1.2 in. Find P99. That?is, find the hip breadth for men that separates the smallest 99?% from the largest 1?%. The hip breadth for men that separates the smallest 99?% from the largest 1?% is P99=

3- Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation of 23.3. Find the probability that a randomly selected adult has an IQ greater than 151.3. The probability that a randomly selected adult from this group has an IQ greater than 151.3 is

Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. 2- -7.19Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standa Next Question z- -0.89 2=1.21 The area of the shaded region isNext Question Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 0.2177 2 0 The indicated z score is