29. The following table lists the distribution by degrees in psychology conferred by degreegranting institutions, by sex and year. These and similar data are reported by the National Center of Education Statistics (NCES) at http://nces.ed.gov/programs/digest/. Bachelor's Degree Males Females 1970-71 21,227 14,602 1980-81 14,332 26,736 1990-91 16,067 42,588 2000-01 16,585 57,060 2005-06 19,865 68,269 Based on the data in this table, how has the number of degrees conferred in psychology changed by sex since 1970-71?
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
29. The following table lists the distribution by degrees in psychology conferred by degreegranting institutions, by sex and year. These and similar data are reported by the National Center of Education Statistics (NCES) at http://nces.ed.gov/programs/digest/.
| Bachelor's Degree | Males | Females |
| 1970-71 | 21,227 | 14,602 |
| 1980-81 | 14,332 | 26,736 |
| 1990-91 | 16,067 | 42,588 |
| 2000-01 | 16,585 | 57,060 |
| 2005-06 | 19,865 | 68,269 |
Based on the data in this table, how has the number of degrees conferred in psychology changed by sex since 1970-71?
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