1. State the type of random sampling for each of the following scenarios by selecting the correct number from the drop-down menu.

X E A-12 picks various coloured marbles out of a box. The Ontario government randomly selects five high schools in Ontario and surveys each teacher in those schools. Every fiftieth family in the Peterborough telephone book is surveyed by phone. Canada is the country chosen for analyzing the health care system, and 50 hospitals are randomly chosen from 20 randomly chosen regions in Canada. simple random sampling systematic random sampling stratified random sampling cluster random sampling multi-stage random sampling destructive random sampling non-random sampling A survey question states: "Given that at the age of 18 people are old enough to fight and die for your country, don't you think they should be able to drink alcohol as well?" The height of a ball was recorded after each bounce. The recorded heights were less than the actual heights because the person doing the study did not hold the ruler properly. sampling bias measurement bias household bias response bias non-response bias A phone solicitation firm kept statistics on the lengths of the phone calls made to their clients. The results are show below: Time (min) 1 2 3 4 5 6 7 Frequency 10 11 24 16 40 10 8 Determine the expected length of a phone call. Just type in the final answer as a decimal rounded to 2 decimal places