subject
Mathematics, 17.04.2020 21:13 jholland03

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.)

i. H0: μw = μnw Ha: μw > μnw
ii. H0: μw ≠ μnw Ha: μw = μnw
iii. H0: μw = μnw Ha: μw ≠ μnw
iv. H0: μw = μnw Ha: μw < μnw

ansver
Answers: 3

Another question on Mathematics

question
Mathematics, 21.06.2019 13:30
Write the converse of the following statement: if the trees have no leaves, then it is fall. if the trees have no leaves, then it is fall. the trees have no leaves, therefore it is fall. it is fall since the trees have no leaves. if it is fall, then the trees have no leaves.
Answers: 2
question
Mathematics, 21.06.2019 17:20
Select a graph that have an equation with a < 0
Answers: 2
question
Mathematics, 21.06.2019 17:30
Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression
Answers: 2
question
Mathematics, 21.06.2019 18:30
Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles
Answers: 2
You know the right answer?
The U. S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites...
Questions
question
History, 08.10.2019 05:10
question
Chemistry, 08.10.2019 05:10
question
Mathematics, 08.10.2019 05:10