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MONTHLY STARTING SALARY (In TRL)

MONTHLY STARTING SALARY (In TRL). TOTAL: 35,280. 1- The Mean can be calculated for any set of NUMERICAL Data 2- The Mean is unique and unambiguous value. 3- The means of several sets of data can always be combined into the overall mean of all the data.

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MONTHLY STARTING SALARY (In TRL)

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  1. MONTHLY STARTING SALARY (In TRL) TOTAL: 35,280

  2. 1- The Mean can be calculated for any set of NUMERICAL Data 2- The Mean is unique and unambiguous value. 3- The means of several sets of data can always be combined into the overall mean of all the data. 4- If each value in a sample were replaced by the mean, then ∑X would remain unchanged 5- The mean takes into account the value of each item in a set of data. 6- The mean is relatively reliable in the sense that means of many samples drawn from the same population generally do not fluctuate, or vary, as widely as other statistics used to estimate the mean of a population. Properties of the Mean

  3. In addition to the properties of the Mean; 1- It splits the data into two parts 2- The median is preferable to the mean because it is not so easily affected by extreme values. Properties of the Median

  4. Problem: Imagine that four classes in Math 264 course obtained the following mean scores on the final examination; 75, 78, 72 and 80. Q: Could you sum these four means together and divide by 4 to obtain an overall mean for all of the four classes? A: This could be done only if the n (the number of students) in each class is identical What if; First Class = 30 students Second Class= 40 students Third Class= 25 students Fourth Class= 50 students Then the weighted mean is =?

  5. Problem: The following list gives the duration in minutes of 24 power failures. (Chapter 3. Exercise: 31) 18 125 44 96 31 53 26 80 49 125 63 58 45 33 89 12 103 127 75 40 80 61 28 129 • Find the median.

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