Mathematics, 12.08.2020 07:01, tatia65
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 non whites. 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 at the 0.05 level of significance to see if the mean life spans in the county were the same for whites and nonwhites.
Required:
a. State the null and alternative hypotheses.
b. What is the random variable of interest for this test?
c. Which distribution (normal or Student's t) would you use for this hypothesis test?
d. Calculate the test statistic and p-value.
e. Find the p-value on TI- 84 Calculator
f. Does it appear that the means are the same? Why or why not?
Answers: 3
Mathematics, 21.06.2019 18:40, haidenmoore92
Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?
Answers: 1
Mathematics, 21.06.2019 19:30, Buddy01
Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit
Answers: 2
Mathematics, 21.06.2019 21:40, janetexcoelho
Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.
Answers: 1
The U. S. Center for Disease Control reports that the mean life expectancy was 47.6 years for whites...
Social Studies, 16.12.2020 02:30
Chemistry, 16.12.2020 02:30
Mathematics, 16.12.2020 02:30
Spanish, 16.12.2020 02:30
Mathematics, 16.12.2020 02:30