11:45 4ill . Il KB/S 45 local_media4746027582210786251 - Read-only O KN . . . f. A student gets the following grades in his seven subjects: 87 for Calculus, 82 for Physics, 79 for Chemistry, 81 for English and 83 for History. Compute for his mean grade if the weights for the five subjects are 5.0, 4.0, 4.0, 3.0 and 3.0, respectively. X = g. It was recorded that 5 brands of ballpen with tag prices of P7.50, P8.00, P9.00, P10.00 and P12.50 were bought by 16, 5, 4, 12 and 6 students. Find the mean sale. * = h. Jessie Salvador, an Engineering student got 88%, 85%, 91% and 93% in four of his subjects. What grade must he get in his fifth subject in order to obtain an average of 90%? X = i. The table below shows the number of respondents who answered 5, 4, 3, 2 and 1 on three questions. Compute for the weighted mean and give the mean interpretation using the scale below: Mean Interpretation 1.00 - 1.79 To a Very Slight Extent (VSE) 1.80-2.59 To a Slight Extent (SE) 2.60 -3.39 To a Moderate Extent (ME) 3.40 -4.19 To a Great Extent (GE) 4.20 -5.00 To a Very Great Extent (VGE) 5 3 2 1 WX Interpretation To what extent do you think Statistics will help you in your 15 20 5 0 chosen career? To what extent do you think Statistics will help you in doing 10 25 3 2 0 research? To what extent do you think Statistics will help you in real life 11 16 8 5 0 situation? O OName: Score: Section: Date: Activity 2 Measures of Variability or Dispersion a. The monthly number of cars sold by a car dealer from January to October for a particular year are: 20 24 12 10 18 4 15 6 11 19. Find the range, variance and standard deviation. b. Sample annual salaries, in thousands of pesos, for Manila and Makati are listed. Manila: 34 25 17 17 27 25 29 33 26 Makati: 26 23 27 28 25 26 18 26 31 "Compute for the range, variance and standard deviation; and interpret the result. "In which area salary is more consistent