1.
5
2=2.5
transitive
joentity action
2. 613 5) = (6_315
3. *= y and y=7, then x=7
4. 8=8
commutative -80didon
symmetric
property of zero
2
6. 8.1=
commutative - multiplication
identity - multiplication
associative - multiplication
7. fx=y, then y=x
2, 418 + 1) = 4-8-4-1
9. 10 - (3-2) = (10-3)* 2
10,6 -2=2-6
distributive
associative - addition
multiplicative inverse
11. 5.0=0
reflexive
12.6 +0=6
ask for
weston

Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above