2. SOC101Y University of Toronto 2013-14 Robert Brym Online Mini-Lecture #2 Rates Click icon to repeat audio Right cursor to advance ->

3. Click icon to repeat audio Right cursor to advance -> Left cursor to go back <-

4. SmallvilleBigville Population, 20125,7507,420 Number of marriages, 20121419 Q: In which town was marriage more frequent in 2012? A: Bigville – 19 marriages took place there while 14 marriages took place in Smallville. Q: In which town was marriage more popular in 2012? A: Offhand, it’s hard to say. The higher frequency of marriage in Bigville may have been the result of the fact that more people lived there. We can’t easily say where marriage was more popular. Q: How can we find out where marriage was more popular? A: By calculating the marriage rate for both towns and comparing the rates. Click icon to repeat audio Right cursor to advance -> Left cursor to go back <-

5. Q: What is a rate? A: A rate is the frequency with which an event occurs in a given place and time period for every x units, where x equals 1,000, 100,000 or some other standard number. Click icon to repeat audio Right cursor to advance -> Left cursor to go back <-

6. To find the marriage rate in each town, you need to solve for x in the following equation: Number of marriages, 2012 = __x__ Population, 20121,000 SmallvilleBigville Population, 20125,7507,420 Number of marriages, 20121419 Click icon to repeat audio Right cursor to advance -> Left cursor to go back <- Standard number Rate

7. For Smallville: Number of marriages, 2012 = __x Population, 20121,000 14__ = x____ 5,750 1,000 14 * 1,000 = 5,750 * x 14,000 = 5,750x 14,000/5,750 = x 2.43 = x = marriage rate for Smallville SmallvilleBigville Population, 20125,7507,420 Number of marriages, 20121419 For Bigville: Number of marriages, 2012 = __x Population, 20121,000 19___ = x____ 7,420 1,000 19 * 1,000 = 7,420 * x 19,000 = 7,420x 19,000/7,420 = x 2.56 = x = marriage rate for Bigville In Smallville, 2.43 marriages took place for every 1,000 residents. In Bigville, 2.56 marriages took place for every 1,000 residents. We conclude that marriage was slightly more popular in Bigville; the greater frequency of marriage was not just the result of the fact that Bigville was bigger than Smallville was. Click icon to repeat audio Right cursor to advance -> Left cursor to go back <-

8. Upper Slobovia Lower Slobovia Population, 20124,350,7122,479,998 Number of suicides, 201211280 Q: Where was the suicide rate higher in 2012 – Upper Slobovia or Lower Slobovia? (Calculate the answer and then click anywhere.) A: In Upper Slobovia. For Upper Slobovia: 80/2,479,998 = x/100,000 80*100,000 = 2,479,998x 8,000,000/2,479,998 = x = 3.22 = suicide rate For Upper Slobovia: 112/4,350,712 = x/100,000 112*100,000 = 4,350,712x 11,200,000/4,350,712 = x = 2.57 = suicide rate Click icon to repeat audio Right cursor to advance -> Left cursor to go back <-

9. SOC101Y University of Toronto 2013-14 Robert Brym Online Mini-Lecture #2 Rates Left cursor to go back <- END