Econometrix Course According to a nationally representative data, people spend on average 7.5 hours per week...
Econometrix Course
- According to a nationally representative data, people spend on average 7.5 hours per week following industrial trends and news on Linkedin. A CEO wants to test whether these figures apply at his company, which has nearly 3,000 employees. He asks one administrator to take a simple random sample of 100 employees and interviews them. The administrator reports that on average, the employees spend 6.6 hours a week on Linkedin, and the sample standard deviation of the sample is 9 hours. Is the difference real? Answer using a hypothesis test.
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According to a nationally representative data, people spend on
average 7.5 hours per week...
A claim is made that college students spend an average of 20 hours per week studying...
A claim is made that college students spend an average of 20 hours per week studying for their courses. You believe the true population average is different than 20 hours, and you would like to test the null hypothesis that μ = 20 hours versus the alternative hypothesis that μ ≠ 20 hours. You gather data from a random sample of 100 college students and calculate a test statistic of 1.2. This means the p-value would be what? A 0.0576...
According to a survey, the average American person reads for 3 hours per week. To test...
According to a survey, the average American person reads for 3 hours per week. To test if the amount of reading in Chicago is more than the national average, a researcher decides to do a hypothesis test, at a 5% significance level. She surveys 17 Chicagoans randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 3.4 hours per week, and the sample standard deviation (s) is 0.8 hours....
QUESTION According to a survey, the average American person watches TV for 3 hours per week....
QUESTION According to a survey, the average American person watches TV for 3 hours per week. To test if the amount of TV in New York City is less than the national average, a researcher decides to do a hypothesis test, at a 1% significance level. She surveys 19 New Yorkers randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 2.5 hours per week, and the sample standard...
14. According to a survey, the average college student spends only 2.2 hours on homework per...
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...
Read about Cokes strategy in Africa in the article below and discuss the ethics of selling...
Read about Cokes strategy in Africa in the article below and discuss the ethics of selling soft drinks to very poor people. Is this an issue that a company like Coke should consider? Africa: Coke's Last Frontier Sales are flat in developed countries. For Coke to keep growing, Africa is it By Duane Stanford Piles of trash are burning outside the Mamakamau Shop in Uthiru, a suburb of Nairobi, Kenya. Sewage trickles by in an open trench. Across the street,...
QUESTION According to a survey, the average American person watches TV for 3 hours per week. To test if the amount of TV in New York City is less than the national average, a researcher decides to do a hypothesis test, at a 1% significance level. She surveys 19 New Yorkers randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 2.5 hours per week, and the sample standard...
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...
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