# Check one answer below the mean is greater than the

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Chapter 25 / Exercise 05
Chemistry & Chemical Reactivity
Kotz/Treichel Expert Verified
(check one answer below)The mean is greater than the median.The mean is less than the median.The mean is about the same as the median.None of the above – no way to know without calculating.5.The following data represents the hours per week worked outside of school by 200 randomly selected nightstudents at a community college:Hours1-89-1617-2425-3233-4041-48a)In the space above, determine the relative frequencies and cumulative relative frequencies.b)Sketch a relative frequency histogram, showing all horizontal and verticallabels.c)Sketch a cumulative relative frequency ogive, showing all horizontal and verticallabels.d)Estimate the median from the graph.e)What percentage of the night students work 32 hours per week or less?f)Without calculating butexplaining your reasoning, which of the following is a reasonable estimate for the standarddeviation?? a) 0.5b) 1c) 10d) 50
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Chapter 25 / Exercise 05
Chemistry & Chemical Reactivity
Kotz/Treichel Expert Verified
6.Determine if each of the following data are categorical, continuous or discrete (circle one for each)a.Number of fatalities from a tsunami:b.Time spent in traffic:c.Number of Songs on your I-pod:d.Your student numbere.Names of cities in California with a Walmart:f.Price per gallon of gasoline:g.Number of Courses taken in a year.h.Tons of steel used by a manufacturer:7.1000 students (500 morning, 300 afternoon, 200 night) were asked how often they use the campus library. The results aresummarized in the table below:MorningAfternoonNightTotala.Find the following probabilities:i)A randomly selected student never uses the library.ii) A randomly selected student is a night student and frequently uses the library. iii) Giventhe student is an afternoon student, the student never uses the library.b. Are “Afternoon Student” and “Never uses library” Independent Events? Justify and explain your answerc. Would the probabilities generated from this data be classical, empirical or subjective probability?8.These descriptive statistics and boxplots were generated from data representingcalories per serving for three types of hotdogs: AllBeef, MixedMeat andPoultry.a.Compare the mean to the median calories for the Meatgroup. Is the result consistent with the shape of the box plot? Explain your answer.b. If the data is approximately bell shaped, between what two values of calories would you expect to find about 95% of the Beefdata?c.Which of the three groups has the most variability in calories perserving? Explain your answer.d..
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