a recent nationwide study of myopia found that 38.1% of americans suffer from myopia. the odds of having myopia are...
0.381
0.616
1.616
2.625
a recent nationwide study of myopia found that 38.1% of americans suffer from myopia. the odds...
According to the Centers for Disease Control and Prevention, more than 130 million Americans suffer from a chronic illness. In a 2013 study, the CDC found that one of every three Americans suffers from at least one chronic condition. More than two-thirds (69%) of the Medicare patients in the study suffered from two or more chronic conditions, and a third of all Medicare patients had four or more chronic conditions. The cost of these illnesses is considerable. The CDC has...
A study found that of 3,532 randomly selected Americans with hypertension, only 1,219 were receiving treatment for it. A. What is the sample statistic (p̂ or ȳ)? Please calculate/write its value. B. Construct a 90% confidence interval for the true proportion of all Americans who are having their hypertension treated. Provide the interval in (left endpoint, right endpoint) format. C. Interpret the confidence interval in the context of the study.
6. A study from the Gallup Organization found that 45% of adult Americans believe that the overall state of the moral values in the US is poor. A study of 25 people is conducted. a. What is the probability that 15 or fewer of them think morals are poor? b. What is the probability that more than 17 of them think morals are poor? c. What is the probability that exactly 12 of them think morals are poor?
A national study report indicated that 20.5% of Americans were identified as having medical bill financial issues. What if a news organization randomly sampled 400 Americans from 10 cities and found that 95 reported having such difficulty. A test was done to investigate whether the problem is more severe among these cities. What is the value of the test statistic?
A national study report indicated that 20.9% of Americans were identified as having medical bill financial issues. What if a news organization randomly sampled 400 Americans from 10 cities and found that 90 reported having such difficulty. A test was done to investigate whether the problem is MORE SEVERE among these cities. What is the value of the TEST STATISTIC (T.S.)?
A national study report indicated that 20.9% of Americans were identified as having medical bill financial issues. What if a news organization randomly sampled 400 Americans from 10 cities and found that 90 reported having such difficulty. A test was done to investigate whether the problem is MORE SEVERE among these cities. What is the CRITICAL VALUE (C.V.) for this situation given a level of significance of α = 0.05?
Homework 1: Causality and Expressions¶ 6. Nearsightedness Study Myopia, or nearsightedness, results from a number of genetic and environmental factors. In 1999, Quinn et al studied the relation between myopia and ambient lighting at night (for example, from nightlights or room lights) during childhood. Question 1. The data were gathered by the following procedure, reported in the study. “Between January and June 1998, parents of children aged 2-16 years [...] that were seen as outpatients in a university pediatric ophthalmology...
A recent study from the University of California, Berkeley, suggests that compared to black Americans, white Americans are less likely to cross the race barrier in online dating. In a sample of 120 white men, 24 initiated contact with someone outside of their race, whereas in a similar sample of 90 black men, 36 initiated contact with someone outside of their race.a. Specify the competing hypotheses to determine if the proportion of white Americans initiating a contact outside their race...
According to a Lawyers.com survey, only 35% of adult Americans had a will (The Wall Street Journal, December 12). Suppose a recent survey of 250 adult Americans found 100 adults with wills.a. Specify the competing hypotheses to determine whether the proportion of adult Americans who have a will differs from the proportion reported .b. Calculate the value of the test statistic and the p-value.c. At the 5% significance level, is the proportion different? Explain.
A recent study from the University of California, Berkeley, suggests that, compared to white Americans, black Americans are more likely to cross the race barrier in online dating. In a sample of 120 white men, 24 initiated contact with someone outside their race, whereas in a similar sample of 90 black men, 36 initiated contact with someone outside their race.a. Specify the hypotheses to justify the suggestion.b. Find the critical value(s) of the appropriate test at the 1% significance level.c....