## anonymous one year ago help please! :)

1. anonymous

@welshfella

2. anonymous

There are 1,300 students in the school. Based on the sample proportion, how many students in the school would be expected to play indoor games for at least four hours every week? 546 598 702 1,248

3. welshfella

i've no idea on this one

4. Michele_Laino

we need to know the sample proportion

5. anonymous

ok then

6. Michele_Laino

it is a missing data

7. anonymous

ok

8. Michele_Laino

do you know what is the sample proportion?

9. anonymous

no

10. Michele_Laino

11. anonymous

is it 1,300

12. Michele_Laino

1,330 is the total number of the students

13. Michele_Laino

1,300*

14. anonymous

umm.. 1300 x 7 ?

15. Michele_Laino

the sample proportion, is a positive number and less than 1

16. anonymous

0

17. Michele_Laino

no, zero can not be, since your options are all different from zero

18. anonymous

so 1?

19. Michele_Laino

the sample proportion has to be a data of your problem

20. anonymous

oh sorry let me show you the whole problem :)

21. Michele_Laino

ok!

22. anonymous

23. Michele_Laino

the requested sample proportion is: $\Large \frac{{42}}{{42 + 52 + 4 + 2}} = ...?$

24. Michele_Laino

25. anonymous

is it 59

26. Michele_Laino

$\Large \frac{{42}}{{42 + 52 + 4 + 2}} = \frac{{42}}{{100}} = ...?$

27. anonymous

21/50

28. Michele_Laino

ok! so the requested number, is: $\Large 1300 \cdot \frac{{21}}{{50}} = ...?$

29. anonymous

546!

30. Michele_Laino

yes!

31. anonymous

Ivy has 4 tiles with pictures of plants and 5 tiles with pictures of animals. Ivy keeps all the tiles on a mat with the pictures hidden and mixes them up. She then turns one tile face up and finds the picture of a plant on it. She removes this tile from the mat and turns over another tile without looking. What is the probability that the second tile that Ivy turns over has a plant on it? 37.5% 44.4% 60.0% 80.0%