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- At the beginning of 2018, a survey showed that a country with a total land area of 500,500 square kilometers had a population density of 483.3 per square kilometer. What was the total population during the survey? A. 96, 563,436 B. 182,086,700 C. 241,891,650 D. 350, 830,401 If the birth rate was 1.3%, how many individuals were born that year? A. 2,683,450 B. 3,144,591 C. 11,320,505 D. 22,463,682 If 612,300 individuals died on the same year, what was the death rate? A. 0.25% B. 0.5% C. 1.5% D. 2%A certain county had a population of 34,485 people. The county hospital is interested in estimating the number of people in the county with blood type-O. To do this, they test blood samples from 228 patients. Out of this group, 10 have blood type-O. Use this sample to estimate the number of people in the county with blood type-O.If Amy spends the whole day swimming every Friday, and only Friday, what percentage of her days in a 15-week period are devoted to swimming?
- The following game is repeated infinitely many times. Suppose both players decide to play a grim trigger strategy to induce cooperation. Define the grim trigger strategies. Set up the comparison between present value of payoff streams and explain is cooperation possible and for what values of the discount factor. Is the value of the discount factor logical? P.2 L R. 4, 4 -1, 5 0,0 P.1 M 5, -1 1, 1 0,0 D 0,0 0,0 3, 3Suppose the prevalence of "dance fever" at a college is 40% among women and 10% among men. If there are half as many men as women, what is the overall prevalence of dance fever at the college? What proportion of people without dance fever at that college are women?The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 35 who smoke. Step 1 of 2 : Suppose a sample of 1089 Americans over 35 is drawn. Of these people, 359 smoke. Using the data, estimate the proportion of Americans over 35 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.
- Please see pictureSuppose that the result of a public opinion poll shows that just 10% of people would be willing to give up their cell phones for 1 week in exchange for $100. How many people would need to be surveyed in order to have a margin of error of ±2%?a report about an isolated community claims there are more newborn females than males although we assume equal frequencies for each. Records indicate 628 boys and 718 girls born in the past month. what are Ho and Ha?
- An interdepartmental task force is being formed to investigate an increase in violent crimes. 1/5 of the task force will be police officers from the local precinct. 1/4 will be ATF agents, and the remaining 22 will be from the FBI. How many people are participating in the task force?The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American adults if they believed that aliens had come to Earth in modern times, and 26% responded yes. Complete parts (a) through (d) below.A hospital report indicates 25% of its patients had an MRI in January. If 1,060 patients were hospitalized in January, how many had an MRI?