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5.1 Continuous Probability Distributions
discrete random variables (X) uniform and binomial distributions calculated probabilities and expected values of X possible values of the random variable X were always integers
Unit 3 - Discrete Probability
• continuous random variables (X)• uniform and normal distributions • calculate probabilities of X using z-scores • possible values of the random variable X are always fractional or decimal values (real numbers)• graphed as smooth, continuous curves • Examples include many characteristics of a population i.e. height
recall...
Unit 5 - Continuous Prob.
Continuous distributions: • can be modelled using equations • probability is the area under the smooth curve of the graph • total area under the curve is 1
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Type of Curves:
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5.1.3: Classification of Histograms MDM4UUsing the following data sets calculate the mean, median, mode, and standard deviation. Graph each data set on the grids provided. Label the shape of each graph. Compare your graphs to your measures of central tendency and summarize your findings.1) Marks on a project {1, 2, 3, 4, 3, 3, 4, 3, 2, 3, 3, 2, 3, 2, 1, 2, 3, 4, 3, 3, 2, 3, 2, 3, 2, 3}2) Monthly rent ($) { 625, 750, 800, 650, 725, 1250, 625, 650, 850, 625}3) Drive thru times (min) {5, 5.5, 6.5, 7, 7.5, 7, 7, 5, 6.5, 5, 5, 8.5, 0.5, 4.5, 7}4) Age of cousins {12, 15, 8, 12, 15, 10, 3, 14, 15}
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1) Identify each of the following situations as discrete distributions or continuous distributions. Explain your reasoning.
a) counting the number of outcomes for drawing a card
b) measuring the time taken to complete a task
c) counting the number of outcomes when tossing three coins
d) measuring the maximum distance a ball can be thrown
2) Using the mean, median and mode, describe the shape of the frequency histogram.
a) mean: 7.5 median: 6 mode: 5.7
b) mean: 6 median: 6 mode: 10, 12
c) mean: 7.5 median: 8.5 mode: 9
d) mean: 7.5 median: 7.5 mode: 7.5
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3) A pair of dice are rolled numerous times. The sum of the dice, as well as the frequency, is recorded. Calculate the mean, median, mode, and standard deviation. Use these results to identify the shape of this histogram.
Sum 2 3 4 5 6 7 8 9 10 11 12
Frequency 2 3 5 7 9 11 8 7 4 2 1
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