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Warm Up (review/prep for the quiz):
1. Identify the sampling technique used in each of the following:
a) Wilmot township randomly selected 20 businesses to complete a survey on safety in the workplace. Every member of each business chosen was required to participate.
b) Coaches of the Senior boys football team had 4 tickets to take students to a Toronto Argonauts game. To choose who got to attend the game, the coaches put each players jersey into a bag and then pulled four out.
2. Identify the type of bias present and explain how the bias could be removed.
"Taking into consideration the need for the board to find a minimum of $4.6 million in savings due to a budget deficit, and given that no school will change more than 20 minutes, do you support the board moving forward with the proposed changes?"
Unit 3 - One Variable Statistics
Day 6 - Common Distributions
Today we will...
1. Identify four different types of distributions
2. Begin to make connections between distributions and the spread and central tendencies of data
Common Distributions
Normal Distribution
* data is distributed _________________ about the mean
* _________, _____________ and _______ are close in value and located at _______________ of distribution
Skewed Distribution
* looks like a normal distribution that has been _______________ to one _________ of the mean
Bimodal Distribution
* has __________ peaks
* it is ____________________ with frequencies clustering around 2 __________________
Uniform Distribution
* has data that has ________________ frequency
* the mean and median are at the _______________ of the data
Example 1: Match the distribution to the appropriate graph.
_____________ _____________ _____________ ______________
Example 2: How would you describe the following distributions? Explain.
a)
b) c)
d)
................
................
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