Week 3 MAT 121 Notes!
Week 3 MAT 121 Notes! MAT 121
Popular in Probability and Statistics for the Liberal Arts I
Popular in Mathematics (M)
This 6 page Class Notes was uploaded by Aria Sivick on Friday September 18, 2015. The Class Notes belongs to MAT 121 at Syracuse University taught by in Fall 2015. Since its upload, it has received 227 views. For similar materials see Probability and Statistics for the Liberal Arts I in Mathematics (M) at Syracuse University.
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Date Created: 09/18/15
914 Dot Plot It is possible to recreate the original list of data values because each data value is represented by a single point Rapid way of organizing info Multiple Bar Graph Scale is not continuous Pie Chart Same information as pareto chart Graph that depicts categorical data as slices of a circle in which the size of each slice is proportionate to the frequency count for the category Pictographs Often misleading Data that are one dimensional are depicted with two dimensional data Chapter 3 Measures of center numbers that try to indicate the middle of data 1 The midrange high observation low observation 2 2 The mode most frequently occurring observation or class of observations Bimodal 2 observations more frequent than the rest Trimodal 3 observations more frequent than the rest 3 Median the observation in the middle when the data has been ordered 1 An odd number of data 1 Ex Quiz scores 355 791O n7 2 An even number of data 1 Ex 38496161737579 between 79 and 81 81828386919197 1 So you take the average of the two numbers 79 81 2 4 Mean arithmetic average 5 Weighted average Exam Notes Rule When computing a statistic from raw data round to one more decimal place than the data has The mean of a grouped frequency distribution can estimate the mean of the underlying data Example Questions What is the relative frequency of 812 class 3 1515 9 60 20 Which class is the modal class Think Mode 1822 because it has the highest frequency What is the median class Between 30 and 31 in the 1822 weight range Exam Structure and Questions Multiple Choice Question 1 10 points Levels of measurement nominal ordinal interval ratio interval and ratio numbers Interval vs Ratio Interval there is not an unambiguous and meaningful zero temperature points in time Level of Measurement Ratio there is an unambiguous and meaningful zero Question 1 examples The City of syracuse employs 479 sanitation workers ratio The students first language is Chinese nominal Maria ranked 25th in her Mat 121 Class ordinal The Magna Carta was signed in 1215 interval Question 2 Convenience systematic stratified clustered 10 points Question 2 examples A professor interested in students opinions on a critical issue asked his MAT 121 students to take a survey Convenience A pollster divides the population into white black Hispanic Asian other and takes a sample from each group Stratified A statistics student surveys every 15th student who walks out of Schine Systematic A newspaper editor chooses 35 of a city39s voting precincts and sends one of his assistants to each of the chosen precincts to survey every voter there Clustered Question 3 grouped frequency of distribution possible info omitted fill in the blank questions about it 20 points Question 4 draw a histogram estimate the mean compute round to one decimal place in answer 20 points Refer to pumpkin example There will be NO RANDOM SAMPLING But just a side note Random sampling of size n every individual had the same chance of being in the sample Simple random sample of size n every collection of n individuals has the same Chance for being the sample Seating Arrangement
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