Mathematics, 06.05.2020 02:05 michaelchavez6959127
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 were the same for whites and nonwhites. (a) State the null and alternative hypotheses. (Let w = white, and nw = nonwhite.) H0: μw = μnw Ha: μw > μnw H0: μw = μnw Ha: μw ≠ μnw H0: μw ≠ μnw Ha: μw = μnw H0: μw = μnw Ha: μw < μnw (b) In symbols, what is the random variable of interest for this test? (Let w = white, and nw = nonwhite.) μw − μnw Xw − Xnw SE xd pc (c) The standard error of (Xw − Xnw) equals (Round to 3 decimal
Answers: 3
Mathematics, 21.06.2019 21:30, girlysimbelieve
Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent. the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244
Answers: 1
Mathematics, 21.06.2019 21:40, angellynn581
The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.
Answers: 1
The U. S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites...
Mathematics, 18.03.2021 21:10
Arts, 18.03.2021 21:10
Mathematics, 18.03.2021 21:10
Mathematics, 18.03.2021 21:10
Mathematics, 18.03.2021 21:10