_..m...... - poo; (- -> 0' Emu-mums. 3mm: cm: HGmaTl Immun- 9 Maps rnmm SCALC98.5.D1Z. MYNOTES ll ASKYOURTEACHER ll PRACTICEANOTHER The time between Infection and the display of symptoms for streptococcal sore throat Is a random variable whose probability density function can be approximated by the following. 7. [-11 Points] fIr) : lmtzeU'DS'H l] s t S 150 and t) : 0 otherwise [t measured in hours) (a) What Is the probability that an Infected patient will display symptoms within the first 24 hours? (Round your answer to mree decimal places.) |:| (b) What Is the probability that an Infected patient will not dlspiay symptoms until after 12 hours? (Round your answer to three decimal places.) |:| Need Help? B. [-11 Points] SCALCB 8.5.014. MY NOTES l l ASKYOUR TEACHER I | PRACTICE ANOTHER I According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. (a) What is me probability that an adult male chosen at random ls between 64 and 74 lnches tall? (Round your answer to mree decimal places.) (b) what percentage of the adult male population Is more than 6 feet tall? (Round your answer to one decimal place.) % Need Help