ADMS 2320 Chapter Notes - Chapter 1: Statistical Inference, Ogive

• School: York University
• Department: Administrative Studies
• Course: ADMS 2320
• Professor: Zhong Ma

Document Summary

Stats ch. 1: what is statistics, a way to get info from data. Data statistics information: descriptive statistics, are methods of organizing, summarizing, presenting data in a convenient and informative way. Turns data into information that can be used for decision making. Is the proportion of times that an estimating procedure will be correct. Measures how frequently the conclusions will be wrong in the long run: eg. The poll is considered accurate within 3. 4 percentage points, 19 times out of 20. Our confidential level is 95% (19/20 = 0. 95), while our significance level is 5: key statistical concepts, population. Is the group of all items or interest to a statistics practitioner. A descriptive measure of population: mean, proportion, sample. Is a set of data drawn from population. A sample of 500 students complete a survey. A descriptive method of sample: populations are very accurate b/c all data was collected but, its expensive to collect, time consuming, sometimes unattainable.