Statistics Concepts and Sampling Methods

Introduction to statistics

Data visualization techniques

Review of Chapter 7

Advanced statistical methods

All dogs in the city

All dogs in the neighborhood

All dogs in the house

Three randomly selected dogs

By picking the smallest dogs

By choosing the largest dogs

By selecting the oldest dogs

By randomly drawing names from a hat

Both are measures of the sample

A parameter is a population measure, a statistic is a sample measure

A parameter is a sample measure, a statistic is a population measure

Both are measures of the population

P

P hat

Pi

X bar

Medians and modes

Proportions and means

Means and medians

Proportions and variances

Quantitative data

Interval data

Categorical data

Ordinal data

Sample size must be less than 5

Sample size must be less than 10

Sample size must be greater than 30

Sample size must be exactly 20

30 pounds

35 pounds

40 pounds

45 pounds

1%

10%

5%

15%