webassign.net bassign + (x) 251 Ch.10 - Math 251, section 003, Fall 2021 | WebAssign G Explain the composition and characteristics of the two most inner layers [-/1 Points] DETAILS OSINTROBUSSTAT1 10.1.026.PR. MY NOTES ASK YOUR TEACHER The U.S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites born in 1900 and 33.0 years for nonwhites. Suppose that you randomly survey death records for people born in 1900 in a certain county. Of the 124 whites, the mean life span was 45.3 years with a standard deviation of 12.7 years. Of the 82 nonwhites, the mean life span was 34.1 years with a standard deviation of 15.6 years. Conduct a hypothesis test to see if the mean life spans in the county wer the same for whites and nonwhites. Calculate the test statistic. (Calculate your answer as whites - nonwhites. Round your answer to two decimal places.) Additional Materials eBook MY NOTES ASK YOUR TEACHER [-/1 Points] DETAILS OSINTROBUSSTAT1 10.4.503.XP. Two types of phone operating system are being tested to determine if there is a difference in the proportions of system failures (crashes). Fifteen out of a random sample of 150 phones with OS, had system failures within the first eight hours of operation. Ten out of another random sample of 150 phones with OS, had system failures within the first eight hours of operation. OS, is believed to be more stable (have fewer crashes) than OS 1. What is the p-value? (Round your answer to four decimal places. ) Additional Materials