Contents Accuracy and Scientific Notation Comparing Modified Boxplots Computing Formula Values Coefficients of Determination and Correlation Grouped Data Histogram Analysis Outliers and Influential Observations Parameters and Statistics Qualitative vs. Quantitative

 1) 0 places, 3 sig. digits, 5.42 x 104 2) 0 places, 5 sig. digits, 1.7846 x 108 3) 7 places, 4 sig. digits, 2.314 x 10-4 4) 5 places, 3 sig. digits, 9.80 x 10-3 5) 3 places, 6 sig. digits, 1.32502 x 102 6) 2 places, 4 sig. digits, 3.741 x 101 7) 4 places, 4 sig. digits, 3.473 x 10-1 8) 1 place, 5 sig. digits, 1.4453 x 103 9) 4.897 10) 245.12 11) 83.1 12) 0.432 13) 110 14) 27.34 15) 539,500 16) 4,390,000 17) 0.00435 18) 0.0006288 19) 57,789 20) 312,200 21) 0.008324 22) 0.0000769

 1) 8 AM is more skewed, 9 AM has largest value, 9 AM has smallest value, 8 AM has largest median, 9 AM has largest range, 9 AM has largest IQR 2) 11 AM is more skewed, 10 AM has largest value, 11 AM has smallest value, 10 AM has largest median, the ranges are the same and 11 AM has largest IQR. 3) 1 PM is more skewed, the largest values are about the same, 2 PM has the smallest value, 1 PM has largest median, 2 PM has the largest range and largest IQR. 4) 3 PM is more skewed, 3 PM has largest value, 4 PM has smallest value, 3 PM has largest median, 4 PM has the largest range and IQR. 5) 5 PM is more skewed, 5 PM has largest value, 6 PM has smallest value, 5 PM has largest median, 5 PM has the largest range, the IQR's are about the same.

 1) 74.08 2) 55.73 3) 0.4733 4) 0.1475 5) 2.72 6) -0.85 7) -0.7171 8) 0.7191 9) 1,637,000 10) 265,400 11) 295.6 12) 94.88

 1) 45.2% of the variation is explained by the regression line. 2) 91.3% of the variation is explained by the regression line. 3) 72.1% of the variation is explained by the regression line. 4) 26.4% of the variation is explained by the regression line. 5) weak positive correlation 6) no correlation 7) strong positive correlation 8) perfect negative correlation 9) moderate positive correlation 10) moderate negative correlation 11) no correlation 12) strong negative correlation

 1) mean = 32.2, std. dev. = 11.1 2) mean = 10.7, std. dev. = 9.6 3) mean = 15.6, std. dev. = 10.8 4) mean = 21.1, std. dev. = 11.7 5) mean = 44.0, std. dev. = 10.6 6) mean = 80.5, std. dev. = 8.1 7) mean = 36.8, std. dev. = 7.6 8) mean = 31.6, std. dev. = 5.2

 1) minimum = 18, maximum = 60, skewed left, one peak at 45,one gap between 24 and 30, no extreme values 2) minimum = 12, maximum = 108, skewed left, two peaks at 54 and 90, one gap between 24 and 36, no extreme values 3) minimum = 0, maximum = 500, skewed right, one peak at 25, 3 gaps: between 100 and 150, between 200 and 250, and between 300 and 400. Since the last gap is twice as large, values between 400 and 500 are extreme. 4) minimum = 15, maximum = 40, skewed right, two peaks at 27.5 and 37.5 (but the second peak is barely a peak), no gaps or extreme values.

 1) outlier near (12.9, 24.4), influential observation near (9.9, 16.1) 2) outlier near (112, 86), influential observation near (129, 121) 3) outlier near (53, 88), influential observations near (68, 108) and (76, 111)

 1) The parameter is the average height of all women aged 20 years or older. The statistic is the average height of 63.9 inches from the sample of 45 women. 2) The parameter is the mean amount of sodium consumed by children under the age of ten. The statistic is the mean of 2993 milligrams of sodium obtained from the sample of 75 children. 3) The parameter is the proportion of patients healed by Nexium in 8 weeks. The statistic is 213/224 = 0.951, the proportion healed in the sample. 4) The parameter is the average farm size in Kansas. The statistic is the mean farm size of 731 acres from the sample of 40 farms. 5) The parameter is the average oil output per well in the United States. The statistic is the mean oil output of 10.7 barrels per day from the sample of 50 wells. 6) The parameter is the proportion of adults 18 or older who read a book in the previous year. The statistic is 835/1006 = 0.830, the proportion who read a book in the sample. 7) The parameter is the average amount of calcium that male teenagers consume. The statistic is the mean of 1081 milligrams of calcium from the sample of 50 teenagers. 8) The parameter is the proportion of adults with kids under 18 who ate together 7 days a week. The statistic is 337/1122 = 0.300, the proportion in the sample who ate together. 9) The parameter is the mean verbal SAT score for students whose first language is not English. The statistic is the mean SAT verbal score of 458 from the sample of 20 students.

 1) Name - designator, Height - quantitative, River - qualitative, State - qualitative, Completed - quantitative 2) No. - designator, Year - designator, Winner - qualitative, Winning Score - quantitative, Loser - qualitative, Losing Score - quantitative, Winning Coach - qualitative, Game Site - qualitative