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Unformatted text preview: Sample = 60 customers whose service times were recorded ( from Goleta) Chapter 3: • Numerical summaries (measures) for the population and the sample • A population parameter is a numerical measure for the population • A sample statistic is a numerical measure for the sample (measure of center) • The mean is the sum of all values (X1+X2+X3+…XN) divided by the number of values • The median is the middle number when the values or measurements are arranged in ascending order. If the number of values or measurements is even, then take the average of the two middle numbers. • (Outliers: values that are much smaller or larger than the majority of the data) • The mode is the value that occurs the most (ex: 1,2,2,3,4 mode = 2) 5 10 15 20 25 30 35 40 45 1 2 3 4 5 6 Percentages...
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This note was uploaded on 04/08/2008 for the course PSTAT 5E taught by Professor Eduardomontoya during the Spring '08 term at UCSB.
- Spring '08