In a BLS study, the average adult spends _______ per day on unpaid work. 1.5 hours 3.4 hours 0 hours 5 hours
Option B.
In a BLS study, the average adult spends _______ per day on unpaid work. 1.5 hours...
1. A national study finds that a US adult spends an average of 48 minutes a day on the phone with a standard deviation of 9 minutes. This data is normally distributed. a) Find the probability that a randomly selected US adult spends more than 60 minutes on the phone a day. b) Find the probability that a randomly selected US adult spends between 32 and 40 minutes on the phone each day. Zina includes her answer below. What went wrong? P(z < -.89) =...
Suppose a study reported that the average person watched 4.35 hours of television per day. A random sample of 15 people gave the number of hours of television watched per day shown. At the 5% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day last year by the average person differed from the value reported in the study? (Note: x overbarequals3.947 hours and sequals1.499 hours.) 3.0 3.4 6.2 2.4 4.1 2.5...
Suppose a study reported that the average person watched 5.39 hours of television per day. A random sample of 15 people gave the number of hours of television watched per day shown. At the 11% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day last year by the average person differed from the value reported in the study? (Note: x overbarxequals=3.933 hours and sequals=1.645 hours.) 1.9 6.3 2.0 4.1 3.4 5.6...
You see an article that claims that Americans spend an average of 5 hours per day watching television with a standard deviation of 1 hour. a. Draw the distribution. b. Find the probability that a randomly selected person spends between 3 and 5 hours watching television. c. Find the percentage of people who spend more than 6 hours watching television. d. If a person is in the top 2.5%, what is the minimum amount of time that the person is...
How many hours on average do AC compressors work per day?
14. According to a survey, the average college student spends only 2.2 hours on homework per day in the year 2000. To test if the amount of time spent on homework per day differed last year from 2000, a researcher decides to do a hypothesis test, at a 10% significance level. He surveys 25 college students randomly and asks them about the number of hours they spend on homework per day, on average, last year. From the data, the sample...
A nationwide survey reveals that teenagers spend an average of 3 hours per day on social media with a standard deviation of 1.5 hours. What is the proportion of teenagers who spend more than 5 hours per day on social media? Group of answer choices .0918 .9082 .0951 .0085
A student spends 8 hours per day listening to music. M hours are devoted to Mozart and B hours to Beethoven. The student’s utility function is , where Umeasures utility. Find the equation of the indifference curves corresponding to utility levels of 4 and 5. Write an equation for the student’s budget constraint. Draw on a diagram your answers to a) and b). On the basis of your diagram, what are the approximate utility-maximizing quantities of Mand B? U =...
An average adult human requires 2,200 kilocalories (kcal) of energy per day (however, this number can vary based on age, gender, and weight). Suppose your diet provides an average of 2,300 kcal per day. How many hours per week would you have to walk to burn off the extra 100 Calories consumed per day? EXPLAIN IN DETAIL
The average employee in the U.S.A. spends μ = 23 minutes commuting to work each day. Assume that the distribution of commute times is normal with a standard deviation of σ = 8 minutes. (a) What proportion of U.S. employees spend less than 15 minutes a day commuting? (b) What is the probability of randomly selecting an employee who spends more than 35 minutes commuting each day?