5. A researcher is concerned about the level of knowledge possessed by university students regarding Philippine history. Students have completed a senior high school level standardized history exam. Major courses for students were also recorded. The percentage of correct answers is recorded below for 32 students. Determine if there will be difference in the scores of students taking up different courses. Education Business Ad Political Science Fine Arts 62 72 42 81 49 63 52 57 75 31 87 58 68 80 64 67 39 22 28 48 79 71 29 26 40 68 62 36 15 76 45

10. Consider the data set {8, 5, 1, 10, 3, 6, 4, 2, 6, 5}. Find the mean, the median, and the mode of the data set. b. If each data point is increased by 3, what will be the mean, the median, and the mode? c. Ifeach data point is multiplied by 3, what will be the mean, median, and mode? d. If the data point 10 is removed from the data set, what will be the mean, the median, and the mode?

A car company wants to know the monthly sales made in ($000), based on the brand of vehicle.The data collected was entered on a MINITAB spreadsheet for analysis. Exhibit II below was subsequently generated. Exhibit 2 Model N Mean Median Tri.Mean Std Dev  S.E. Mean Hyundai 23 109 135 107.64  * 1.34 Toyota 27 165 124  143.65 9.5 ** a) Determine the values of * and **. b) Give the unbiased point estimate for the average monthly earning from Hyundai Vehicles.c) Give the unbiased point estimate for the variance of monthly earning from Hyundai Vehicles.d) Assuming normality, construct and interpret a 90% confidence interval for the average monthly earning from Toyota Vehicles.

The mean absolute deviation, or MAD, and the interquartile range, or IQR, are measures of variability. Measures of variability tell you how much the values in a data set tend to differ while a smaller measure of variability means that the data is more consistent and close to from one another. A greater measure of variability means that the data is more spread out Are you ready for more? LFind possible locations for the 6 pennies, Les Lesson 5 Summary the measure of center. To calculate the MAD of a data set: 1. Find the mean of the values in the data set. 2. Find the distance between each data value and the mean on the number line: |data value - mean| 3. Find the mean of the distances. This value is the MAD. To calculate the IQR, subtract the value of the first quartile from the value of the third quartile. Recall that the first and third quartile are included in the five number summary. 38 Student Workbook Algebra