University:
Skagit Valley College
Course:
MATH 146 | Introduction to Stats
Academic year:

2023
Views:

220

Pages:

12
Author:

M. Hamilton

Math& 146: Introduction to Statistics 8:00am 9:50am, T/Th Oak Hall 314 Instructor: Jeff Stady Office: Oak Hall 210 1 2 3 Section 1.1: Definitions of Statistics, Probability, and Key Terms Goals: 1) Recognize and differentiate between key terms: Statistics Data Variable Population Sample Parameter Statistic Mean Proportion 2) Be able to determine, from a given scenario, the population and the sample. 3) Be able to determine, from a given scenario, if a stated value is a parameter or a statistic. 4) Be able to determine, from a given scenario, what the variable is and whether it is categorical (qualitative) or numerical (quantitative). 4 5 Data: Population, sample, parameter, statistic: 6 Variables: Means and proportions: 7 8 9 PEW Research Center: Gallup Organization: 10 From the PEW Research Center Article: 1) Identify the sample and population 2) How many people are in the sample? How many people do you think are in the population? 3) The article states that, "Among employed adults who have heard of ChaptGPT, 60% of those ages 30 to 49 say chatbots will have a major or minor impact on their own job in the next 20 years." a) Is 60% a proportion or a mean? b) Is 60% a statistic or parameter? Explain. 4) What is the actual number of U.S. adults ages 30 to 49 who think chatbots will have a major or minor impact on their own job in the next 20 years? What is the exact number? 5) What could be a variable in this study? Is that variable qualitative or quantitative? 11 12