The data shows the number of years that a random sample of 20 employees worked for an insurance company before retirement. Employee Number Years Worked

1

8

2

13

3

15

4

3

5

13

6

28

7

4

8

12

9

4

10

26

11

29

12

3

13

10

14

3

15

17

16

13

17

15

18

15

19

23

20

13

% of the employees in the sample worked for the company for at

The sample mean for the number of years worked is and

least 10 years. Round your answers to the nearest integer.

Which of the following lines does not intersect the line y=-2x+3 ? a) y=2x b) y=2x-3 c) y=2x+3 d) y=-2x-3

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get

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