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Probability
1. As a manager, what are some benefits of applying probability concepts to solve business-related problems? Would business decisions suffer without probability concepts?
2. The admission officer at John Doe College checked the Scholastic Aptitude Test (SAT) math scores for all the students admitted in 2013 (mean = 640) and the SAT math scores for all the students admitted in 2014 (mean = 570) and concludes that the students admitted in 2013 had higher average SAT math scores than the students admitted in 2014. Which method did the admission officer employ? Descriptive statistics or inferential statistics?
3. What is the difference between descriptive and inferential statistics? Please give an example for each.
Flu cases this past fly season in the Central City school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35. Are the kids in Central City as sick as the kids throughout the state?
In a recent study of 86 working adults, the mean number of hours per week spent talking on the phone was 21.6. The sd= 5.7 hours.
Develop three scatter diagrams showing overhead costs against each of the three proposed independent variables and how is forecast error calculated?
A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse?
q1. assume that two independent random samples of size 100 each are taken from a population that has a variance of 36.
a random digit dialing telephone survey of 880 drivers asked recalling the last ten traffic lights you drove through
Adults is approximately normal with a mean of 191 lbs. and a standard deviation of 20 lbs. Using the 68-95-99.7 rule. What percent of males weigh more than 211 lbs?
The confidence interval for proportion of adults who approve of the candidate is ____
Construct a relative frequency distribution for the weights of regular Coke by starting the first class at 0.7900 lb. and use a class width of 0.0050 lb.
consider the formula used for any confidence interval and the elements included in that formula. what happens to the
a researcher believes that individuals in different occupations will show differences in their ability to be
the main reason women seek medical attention for menopausal symptoms is hot flashes. dietary supplements containing
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