The table below shows the Mens 800 Meter Run World Records:
* Sebastian Coe, GB, 1981
1. Is there an
Quiz Review WS
Here is a scatterplot of reading test scores against IQ test scores for 14 fifth-grade children.
1. Is there a clear explanatory variable and response variable in this setting? If so, tell which is
which. If not, expla
Point Estimatora statistic that provides an estimate of a population parameter.
Point Estimate The value of that statistic from a sample. It is the best guess at the value of anunknown parameter.
The sampling distribution of xtells us how close to th
Random Variablea variable that takes numerical values that describe the outcomes of some chance process.
Probability Distributionthe probability distribution of a random variable gives its possible values and their
Discrete Random Vari
Chapter 7 Sampling Distributions
Parameter a number that describes some characteristic of the population. It is usually not
known because the entire population is unable to be examined.
Statistic a number that describes some characteristic of a sample. Th
Chapter 10 - Comparing Two Populations or Groups
Comparing 2 Proportions
The difference between two population proportions is denoted p1 - p2
The difference between two sample proportions is denoted:
^p2 with sample sizes
n p 1 , n ( 1p 1)
Chapter 11 Inference for Distributions of Categorical Data
In this chapter, we will be examining the distribution of a single categorical variable in a population.
The chi-square goodness-of-fit test allows us to determine whether a hypothesized distribut
Chapter 9 Testing a Claim
Confidence Intervals and Significance Tests are two of the most common types of statistical inference.
-Confidence Intervals are used to estimate a population parameter.
-Significance Tests assess the evidence provided by data ab
Chapter 5 Probability- Introduction + 5.1 Randomness, Probability, and Simulation
Chance behavior is unpredictable in the short run but has a regular and predictable pattern in the long run.
Law of Large Numbers if we observe more and more repetitions of
Chapter4 Designing Studies
Populationthe entire group of individuals about which we want information
Sample part of the population from which we actually collect information. We use information from a sample to
draw conclusions about the entire population
Response variable (y-variable/ dependent) measures an outcome of a study.
Explanatory variable(x-variable/ independent) may help explain/influence/predict changes in a
Scatterplotshows the relationship b
Text: Yates, Daniel, David Moore and Darren Starnes, The Practice of Statistics 2rd ed.,
W.H. Freeman and Company, New York aligned with College Board Indicators
AP Questions are available from the College Board website
Analysis of Variance (ANOVA) - Solutions
One-way analysis of variance is a method for comparing several population means, when the data are from independent samples. It can be thought of as a tool for examining the relationship between a quantitative resp
Chapter 12 More About Regression
12.1 Inference for Linear Regression
Population Regression Line (true regression line) the least-squares regression line for the
population of data.
Sample Regression Line (estimated regression line) the least-squares regr