1. Suppose IQ's are well described by a normal model with means 100 and standard deviation 16. Use the normalcdf and invNorm functions to answer the following: a) What percent of IQ's would you expect to be between 112 and 132? b) What percent of IQ's would you expect to be under 90? c) What percent of IQ's would you expect to be over 80? d) What IQ is required to be in the to 3 percent of all IQ's 2. The table shows the number of live births per 1000 women aged 15-44 years in the United States Year 1965 1970 1975 1980 1985 1990 1995 2000 2005 Rate 19.4 18.4 14.8 15.9 15.6 16.4 14.8 14.4 14.0 Use your calculator to make a scatter plot. Describe its shape (no need to reproduce the scatterplot here.) Enter the years as 65, 70, 75, ect.Give the equation of the regression line.Give the correlation coefficient for this data. Interpret the value of r.Use the equation of the regression line to estimate the birth rate in 1978.Can you use the equation of the regression line to predict the birth rate in 2014. Explain

The manager of a local Gap store estimates that on average the probability of a customer entering the store and will purchase something is 20% (0.20). Assume a Binomial distribution 1.  What is the probability that 3 of the next 4 customers will make a purchase? 2.  What is the probability that one of the next 4 customers will make a purchase?