1) What is the percentage of typists who type 60 wpm or faster given that typing speed is normally distributed with a mean of 45 wpm and a standard deviation of 12 wpm? Remember, probabiities should be written out to 4 decimal places.
2) IQ scores have an average of 100 with a standard deviation of 15. What is the percentage of people who have an above average IQ, i.e., above 110? Remember, probabilities should be written out to 4 decimal places.
3) What is the percentage of new babies that weigh over 10 lbs if the weight of a newborn is distributed like a normal distribution with a mean of 8.5 lbs and a standard deviation of 2 lbs? Remember, probabilities should be written out to 4 decimal places.
4) Find the 17th percentile of IQ scores if IQ is distributed as a normal distribution with mean 100 and standard deviation 15. Please use 2 decimal places in your answer.