Preventing heart attacks: Medical researchers performed a comparison of two drugs, clopidogrel and ticagrelor, which are designe
Preventing heart attacks: Medical researchers performed a comparison of two drugs, clopidogrel and ticagrelor, which are designed to reduce the risk of heart attack or stroke in coronary patients. A total of 6714 patients were given clopidogrel, and 6657 were given ticagrelor of the clopidogrel patients, 562 suffered a heart attack or stroke within one year, and of the ticagrelor patients, 675 suffered a heart attack or stroke. Can you conclude that the proportion of patients suffering a heart attack or stroke is greater for ticagrelor? Let P, denote the proportion of patients suffering a heart attack or stroke with clopidogrel and P2 denote the proportion patients suffering a heart attack or stroke with ticagrelor. Use the a0.10 level of significance and the critical value method. Part 1 of 5 State the null and alternate hypotheses. H.: P.-P HIPICP2 This hypothesis test is a left-talled vtest. Part 2 of 5 Find the critical value(s). Round the answer(s) to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): 1.28 Part: 2/5 Part 3 of 5 Compute the test statistic. Round the answer to two decimal places. - 0 5
Government agencies keep data about the income distribution of the population. The Gonzalez family and Allen family live in a county with 5000 families. The Gonzalez family's income is at the 38th percentile. The Allen family's income is at the 73rd percentile. (a) Which of the following must be true about the Gonzalez family's income? About 38% of the families in their county earn less than the Gonzalez family. The Gonzalez family earns about 38% of the highest income in their county. The Gonzalez family's income is in the top half of incomes in their county. The Gonzalez family earns $38,000. (b) Which of the following must be true about the Gonzalez family's and the Allen family's incomes? Both the Gonzalez family and the Allen family earn more than the median income. Both the Gonzalez family and the Allen family earn less than the median income. The Allen family earns more than the Gonzalez family. The Gonzalez family earns more than the Allen family.
mplete the follo The following das 73 Answer the following question over class limits. 112. The number of students per teacher at a high school ranges from 7 to 26 students. Find the class width and then find the class limits if the data were to be separated into five classes. Error Analysis - State the reason why each frequency table below is incorrectly constructed. 13. Class Limit 27-32 33-38 39-44 45-49 50-55 Frequency 1 0 6 4 2 14. Class Limit 5-9 9-13 13-17 17 - 20 20-24 Frequency 1 2 5 6 3 15. Class Limit 123 - 127 128-132 138 - 142 143-147 Frequency 3 7 2 19 16. Class Limit 9-13 14-19 20-25 26-28 29-32 Frequency 1 6 2 5 9 14 Organizing Data Using Frequency Distributions Ashley Spencer
The accompanying data represent the approximate population, in millions, of the 20 most populous cities in the world. 13.4 12.4 9.7 8.5 7.30 13.4 11.5 9.4 7.9 7.2 12.6 11.5 9.1 7.8 7.1 12.6 11.2 8.9 7.5 7.1 Use these data to construct a frequency distribution with a first class of 7.0 -7.9. Fill in the missing classes and the frequency for each class below. Population (millions of people) 7.0 -7.9 Number of Cities 10.0 - 10.9 11.0 -11.9 20