Types of Distributions



MBF3C Statistics Week 2 Day 1Types of DistributionsHistograms can take on any of several common shapes. The three distributions we will be looking at area _______________, ________________and ____________________.What does it mean for a graph to have a symmetrical distribution? _____________________________________________________________1. Normal DistributionsA ___________ shaped distribution that is __________________.Ex 1: A pair of dice were rolled 75 times. After each roll, their sum was recorded and graphed. 233680013589000Sum on diceFrequency2133465861171581299105114121Note: Even though it______________ perfectly _______________, it still fits the definition of a normal distribution.2. Bimodal DistributionsThere are _______peaks on the graph. (Two values that occur most frequently)Ex 2: A class of grade 6 and grade 1 students each measured their heights. They recorded and graphed them Height (cm)85534515176500Freq.105.5-110.51110.5-115.511115.5-120.58120.5-125.5376047050800005125.5-130.53130.5-135.52135.5-140.50140.5-145.52145.5-150.55150.5-155.58155.5-160.511160.5-165.533. Skewed DistributionsA __________________ distribution of data.Ex 4: Sally picked up a handful of quarters. She recorded the year of each and made a graph. 262890015367000YearFreq.1955.5-1960.521960.5-1965.631965.5-1970.531970.5-1975.551975.5-1980.581980.5-1985.581985.5-1990.5101990.5-1995.5121995.5-2000.5162000.5-2005.5152005.5-2010.52 ................
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