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Directions: Solve Completely. Observe accuracy: at least two decimal places. 1. The length of time to complete a standard achievement test possesses a mean of 58 minutes, with a standard deviation of 9.5 minutes. lfthe professor wants to time the exam so that it will be completed by 90% of the students, how long an examination period must be scheduled? Data collected over a long period of time indicate that a particular birth defect occurs in one of every 1000 live births. Data collected from a medical center in a particular section of the country found 10 children with the birth defect from the total of 20,000 birth records examined. If we assume the 20,000 records examined represent a random sample of birth records, what is the probability of observing 10 or fewer children with birth defects in the sample? The following data are pulse rates and heights for a group of 10 female statistics students: mum-E- mun-\"Is- a. What is the least-squares regression line from predicting pulse rate from height? b. What is the correlation coefficient between height and pulse rate