Question

on d. If a teacher wants to increase a class test average of 62 to 70, what could he or she do to each student's test score to achieve that? Add Doints to each student's to increase the cererage of scores from 42 7. a. A student scores 50 and 100 on two tests in a class. What is his average? 5oo Hoo - 150 - 75 b. Another student scores 75 and 75 on two tests in a class. What is her average? 75+75 -150 c. The mean gives us information about the center of a set of numbers. What does it not describe? 8. Find the point at which these numbers would balance: 7,13,6, 14, 5, 15

Answer 1

D earlier average of Test=62 Teacher wants to increase average of test to to Difference a 70-62 =8 Teacher should be increase & mark or point to each student's score to achieve average of To instead of 62 @ score in Ist test = 50 score in and test=100 Average = sum of numbers in both test B Number of test = 507100 = 50 - 75 6 score in Ist test = 75 score in and test=75 - Average = sum of mumbers in both test - Number of Test. = 45+75 750 75,75 2 © The mean gives us information about the centre of a set of a number but it does hot describe how much each number less or more than average or centre In above a and b In both condition student's Average score is same, but it does not describe how much score in each test Another example. Suppose score in Ist test=20 S score in and test=130 Average = 20+130 = 150 = 75 Now Average is same as earlier but mean does not describe the low score in Ist test and good scose in and test

Numbers: 7, 13, 6, 14,5,15 Togel numbers = 6 Mean = Sum of observation / numbers - Tosed numbers = ++13 +6 714 +5 +15 = 60 bosta flo Mean number / Average Balance point =10 Hence at 10 All the numbers would Balance