University:
McNeese State University
Course:
MATH 231 | Elementary Probability and Statistical Inference
Academic year:

2024
Views:

487

Pages:

1
Author:

Tori K.

Math 231 1-1 An Overview of Statistics Baldwin Ex 3: For each study, identify the population and the sample. Then determine which part of the study represents the descriptive branch of statistics. What conclusions might be drawn from the study using inferential statistics? 1. A study of 2560 U.S. adults found that of adults not using the Internet, 23% are from households earning less than $30,000 annually, as shown in the figure. Population: responses U S of . of Sample: responses Descriptive 2540 "23 % : adults U income adults S from are $30 , 000 anually Inference: lower . in the households " study earning less than . households afford cannot internet 2. A study of 300 Wall Street analysts found that the percentage who incorrectly forecasted high-tech earnings in a recent year was 44%. Population: high-tech earnings forecast all of wall street analysts Sample: forecast study . Descrpritive : of the 300 wall street analysts in the "Timepercentage who incorrectlyto recastea Inference: the stock market is difficult to estimate , even for professionals. 3