Review LaterQuestion 8If the correlation between body weight and annual income were highand positive, we could conclude that:a) O high-income people tend to spend a greater proportion of theirincome on food than low-income people.b) O high-income people tend to be heavier than low-income people.c) O high incomes cause people to gain weight.d) O high incomes cause people to eat more food.e) O low incomes cause people to eat more food.Review Later

Answered: Image /qna-images/answer/df472c6a-f5e9-4aa3-9814-65ec45f3d2b5.jpg

Answered: If the correlation between body weight…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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7) Decide if the following are positive or negative correlations: a) the more hours studying, the higher the students’ GPA______b) the more cardiovascular exercise, the lower the heart disease________c) the more cigarettes smokes, the higher cases of liung cancer.
How much customers buy is a direct result of how much time they spend in the store. A study of average shopping times in a large national houseware store gave the following information (Source: Why We Buy: The Science of Shopping by P. Underhill). Women with female companion: 8.3 min.Women with male companion: 4.5 min. Stores that sell mainly to women should figure out a way to engage the interest of men! Perhaps comfortable seats and a big TV with sports programs. Suppose such an entertainment center was installed and you now wish to challenge the claim that a woman with a male friend spends only 4.5 minutes shopping in a houseware store.
Data from the Bureau of Labor Statistics indicates that in a certain month, 33.1% of the labor force had a high school diploma or fewer years of education, 20.2% had some college or an associate's degree, and 46.7% had a bachelor's degree or more education. Of those with a high school diploma or fewer years of education, 9.1% were unemployed. Of those with some college or an associate's degree, 3.3% were unemployed, and of those with a bachelor's degree or more education, 3.1% were unemployed. Find the probability that a randomly chosen labor force participant has a high school diploma or less education given that he or she is unemployed. ..... The probability is (Type an integer or decimal rounded to three decimal places as needed.)
Data from the Bureau of Labor Statistics indicates that in a certain month, 36.8% of the labor force had a high school diploma or fewer years of education, 29.9% had some college or an associate's degree, and 33.3% had a bachelor's degree or more education. Of those with a high school diploma or fewer years of education, 6.8%were unemployed. Of those with some college or an associate's degree, 4.7% were unemployed, and of those with a bachelor's degree or more education, 2.9%were unemployed. Find the probability that a randomly chosen labor force participant has some college or an associate's degree given that he or she is unemployed.
A research study reports the results of a correlational study that shows a negative relationship between parent stress at work and the mental health of their children. What possible findings would show this? A. Parents who report higher stress at work tend to have children with higher mental well-being scores B. Parents to report higher stressed out work tend to have children with higher anxiety scores C. Parents who report lower stress at work tend to have children with lower anxiety scores D. Parents who report lower stress at work tend to have children with higher mental well-being scores
The London School of Economics and the Harvard Business School have conducted studies of how chief executive officers (CEOS) spend their time. These studies have found that CEOs spend many hours per week in meetings, not including conference calls, business meals, and public events (The Wall Street Journal). Shown below is the time spent per week in meetings (hours) for a sample of 25 CEOS. 20 20 23 15 19 a. What is the least amount of time spent per week on meetings? The highest? 17 - 18 19 - 20 21 22 23 24 Total Prepare a histogram 22 23 14 19 17 Frequency b. Use a class width of two hours to prepare a frequency distribution and a percent frequency distribution for the data. Round your answers to the nearest whole number. If your answer is zero, enter "0". Hours in Meetings per week 11-12 13 - 14 15 - 16 Percent Frequency % % % % 12 % % % % 18 13 15 23 23 17 12 15 19 21 20 12 17 21
Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.7, with sample standard deviation s = 5.2. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. (a) What is the level of significance?State the null and alternate hypotheses. H0: ? = 19.4; H1: ? < 19.4H0: ? ≠ 19.4; H1: ? = 19.4 H0: ? = 19.4; H1: ? ≠ 19.4H0: ?…
The following is based on information from The Wolf in the Southwest: The Making of an Endangered Species, by David E. Brown (University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to destroy wolves. In a recent sample of 37 wolves, there were only 11 females. One theory is that male wolves tend to return sooner than females to their old territories, where their predecessors were exterminated. Do these data indicate that the population proportion of female wolves is now less than 50% in the region? Use α = 0.01. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: P 0.5 O Ho: P = 0.5; H₁: p 5 and nq > 5. O The Student's t, since np > 5 and ng > 5. The standard normal, since np < 5 and nq < 5. O The Student's t, since np < 5 and nq < 5. What is the value of the sample test statistic? (Round…
4. Straight As now, healthy later A study by Pamela Herd of the University of Wisconsin-Madison found a link between high-school grades and health. Analyzing data from the Wisconsin Longitudinal Study, which has tracked the lives of thousands of Wisconsin high-school graduates from the class of 1957, Herd found that students with higher grade-point averages were more likely to say they were in excellent or very good health in their early 60s. Does this mean people will live healthier lives if they increase their GPA? Explain.47
Data from the Bureau of Labor Statistics indicates that in a certain month, 35.7% of the labor force had a high school diploma or fewer years of education, 29.4% had some college or an associate's degree, and 34.9% had a bachelor's degree or more education. Of those with a high school diploma or fewer years of education, 5.5% were unemployed. Of those with some college or an associate's degree, 4.4% were unemployed, and of those with a bachelor's degree or more education, 2.4% were unemployed. Find the probability that a randomly chosen labor force participant has some college or an associate's degree given that he or she is unemployed. 12 The probability is 0 (Type an integer or decimal rounded to three decimal places as needed.)
3. The table below shows the expected years of schooling and gross domestic product (GDP) of the Southeast Asian countries in 2017. Use this information to answer the following: 1. Determine the correlation between the expected years of schooling and GDP. II. Based on the result, what can you conclude about the relationship between the expected years of schooling and GDP? Country Expected Years of Schooling GDP per capita (in international-$) Brunei 14.5 71809.3 Cambodia 11.7 3645.1 Indonesia 12.8 11188.7 Laos 11.2 6397.4 Malaysia 13.7 26808.2 Myanmar 10 5591.2 Philippines 12.6 7599.2 Singapore 16.2 85535.4 Thailand 14.7 16277.7 Vietnam 12.7 6171.9 Source: https://ourworldindata.org/grapher/expected-years-of-schooling-vs-qdp-per-capita
Socially conscious investors screen out stocks of alcohol and tobacco makers, firms with poor environmental records, and companies with poor labor practices. Some examples of "good," socially conscious companies are Johnson and Johnson, Dell Computers, Bank of America, and Home Depot. The question is, are such stocks overpriced? One measure of value is the P/E, or price-to-earnings ratio. High P/E ratios may indicate a stock is overpriced. For the S&P Stock Index of all major stocks, the mean P/E ratio is ? = 19.4. A random sample of 36 "socially conscious" stocks gave a P/E ratio sample mean of x = 17.8, with sample standard deviation s = 5.8. Does this indicate that the mean P/E ratio of all socially conscious stocks is different (either way) from the mean P/E ratio of the S&P Stock Index? Use ? = 0.05. I need help with sketching (d) and (e)

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