Concept explainers
Critical Thinking:
Do Male Symphony Conductors Really Live Longer?
Several media reports made the interesting observation that male symphony conductors live longer than other males. John Amaral wrote in Awaken that orchestra conductors “live longer than almost any other group of people by three to seven years.” Robert Levine wrote in Polyphonic.org that they live longer “because they stand up while working.” Some provided other explanations for this phenomenon, often referring to cardiovascular activity. But do male symphony conductors really live longer than other groups of males? The Internet can be researched for possible answers. Let’s also consider the following.
2. It is reasonable to assume that males do not become symphony conductors until they have reached at least the age of 40 years. When comparing life spans of male conductors, should we compare them to other males in the general population, or should we compare them to other males who lived until at least 40 years of age? Explain.
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Elementary Statistics (13th Edition)
- In February 2021, the Chicago Tribune reported:“The overdose epidemic that has ravaged Chicago has not spared the nearby suburbs, some of which have death rates comparable to anything seen in the city, according to a report released this week by the Cook County Department of Public Health. ZIP codes in the towns of Worth, Broadview, Maywood, and Forest Park, areas that “have substantially lower median household incomes and higher poverty rates,” have been especially hard-hit, the report said.”In the article, they claimed that lower incomes were associated with higher overdose death rates and that overdose death rates are increasing over time. The data you have been analyzing wasn’t focused on Chicago, obviously. But do your results support the general gist of the statistical argument being made in this Tribune excerpt? Please address:• Do overdose death rates appear to be associated with per capita income (use scatterplot)?• Do overdose death rates appear to be increasing over time…arrow_forwardYou may need to use the appropriate appendix table or technology to answer this question. Advertisers contract with internet service providers and search engines to place ads on websites. They pay a fee based on the number of potential customers who click on their ad. Unforțunately, click fraud-the practice of someone clicking on an ad solely for the purpose of driving up advertising revenue–has become a problem. Businessweek reports that 4C percent of advertisers claim they have been a victim of click fraud. Suppose a simple random sample of 390 advertisers will be taken to learn more about how they are affected by this practice. (Round your answers to four decimal places.) (a) What is the probability that the sample proportion will be within ±0.04 of the population proportion experiencing click fraud? (b) What is the probability that the sample proportion will be greater than 0.45?arrow_forwardA certain allergen affects approximately 3 people per 10,000 in the United States. Assuming the U.S. population is approximately 326 million people, how many people suffer from this allergen? (See Example 4 in this section.)arrow_forward
- An immunologist is interested in whether the number of symptoms of the flu a person first exhibits is related to how many days that person will be sick. What is the appropriate test?arrow_forwardUse the given conditions to write an equation for the line in point-slope form and in slope-intercept form. x-intercept = 315 == 15 and y-intercept = 1 Type the point-slope form of the equation of the line. 7 (Use integers or simplified fractions for any numbers in the equation.)arrow_forwardHealthy Sleep Duration. The Centers for Disease Control and Prevention (CDC) define a healthy sleep duration to be at least seven hours per day. The CDC reports that the percentage of people who report a healthy sleep duration varies by marital status. The CDC also reports that in 2018, 67% of those who are married report a healthy sleep duration; 62% of those who have never been married report a healthy sleep duration; and 56% of those who are divorced, widowed, or separated report a healthy sleep duration. The file SleepHabits contains sample data on the sleeping habits of people who have never been married that are consistent with the CDC’s findings. Use these data to answer the following questions. Develop a point estimate and a 95% confidence interval for the proportion of those who have never been married who report a healthy sleep duration. Develop a point estimate and a 95% confidence interval for the mean number of hours of sleep for those who have never been married. For…arrow_forward
- The proportion of individuals in the United States who reported being “very happy” in 2014 was 0.911. In a recent survey of 1,225 US adults, 88.2% reported being “very happy.” Has the proportion of US adults who are “very happy” changed significantly?arrow_forwarda 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?arrow_forwardOpinions are split about a coffee company's pumpkin-flavored coffee (PFC). Yet every year over the last five years the consumption of pumpkin-flavored goods has increased. If we look at the numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a magazine, the amount spent by PFC buyers at the coffee company is about 17% higher than non-PFC buyers. The accompanying table shows a random sample of eight consumers, the amount they spend per week, and the number of PFCs purchased per week. PFC Spending 2 13.88 7 39.11 4 19.79 1 9.84 3 15.43 1 21.52 5 37.39 3 13.85 Calculate the slope and y-intercept for the regression formula. The slope is b1=4.465 The y-intercept is b0=6.840 Provide an interpretation for the value of the slope. Because the slope is positive, it can be…arrow_forward
- Opinions are split about a coffee company's pumpkin-flavored coffee (PFC). Yet every year over the last five years the consumption of pumpkin-flavored goods has increased. If we look at the numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a magazine, the amount spent by PFC buyers at the coffee company is about 17% higher than non-PFC buyers. The accompanying table shows a random sample of eight consumers, the amount they spend per week, y, and the number of PFCs purchased, x, per week. PFC Spending 1 13.17 8 38.65 3 19.49 2 9.56 4 15.85 1 21.82 5 37.53 3 13.69 α=0.05 t= 3.07 p-value= 0.22 Construct a 95% confidence interval for the population slope. UCL = LCL = (Round to two decimal places as needed.)arrow_forwardOpinions are split about a coffee company's pumpkin-flavored coffee (PFC). Yet every year over the last five years the consumption of pumpkin-flavored goods has increased. If we look at the numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a magazine, the amount spent by PFC buyers at the coffee company is about 17% higher than non-PFC buyers. The accompanying table shows a random sample of eight consumers, the amount they spend per week, and the number of PFCs purchased per week. PFC Spending 2 13.88 7 39.11 4 19.79 1 9.84 3 15.43 1 21.52 5 37.39 3 13.85 Calculate the slope and y-intercept for the regression formula. The slope is b1=(Round to three decimal places as needed.)arrow_forwardOpinions are split about a coffee company's pumpkin-flavored coffee (PFC). Yet every year over the last five years the consumption of pumpkin-flavored goods has increased. If we look at the numbers, it also becomes clear why a leading coffee company keeps offering the PFC earlier and earlier every year. According to a magazine, the amount spent by PFC buyers at the coffee company is about 17% higher than non-PFC buyers. The accompanying table shows a random sample of eight consumers, the amount they spend per week, y, and the number of PFCs purchased, x, per week. PFC Spending 1 13.17 8 38.65 3 19.49 2 9.56 4 15.85 1 21.82 5 37.53 3 13.69 α=0.05 t= 3.07 p-value= 0.022 Construct a 95% confidence interval for the population slope. UCL = 6.69 LCL = 0.75 What conclusions about PFC purchases and spending can be drawn from these…arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill