CCOG for MTH 244 Spring 2024
 Course Number:
 MTH 244
 Course Title:
 Statistics II
 Credit Hours:
 4
 Lecture Hours:
 40
 Lecture/Lab Hours:
 0
 Lab Hours:
 0
Course Description
Addendum to Course Description
This is the second term of a twoterm sequence (MTH 243 and MTH 244). This course is intended to provide an introduction to statistics in a databased setting.
Intended Outcomes for the course
Upon successful completion, students should be able to:
 Critically analyze the data from observational studies, surveys, and experiments, and using appropriate statistical methods and technology, judge if the results are reasonable, and then interpret and clearly communicate the results.
 Interpret studies in scholarly and scientific publications and make sense of statistical information provided by the media.
 Understand and be able to communicate the underlying mathematics involved to help another person gain insight into probability and statistics concepts encountered in real world situations.
 Reason from data and use standard mathematical terminology, notation, and symbolic processes in order to engage in work, study, and other applications that require the use of and an understanding of the concepts of statistics in a databased setting.
Quantitative Reasoning
Students completing an associate degree at Portland Community College will be able to analyze questions or problems that impact the community and/or environment using quantitative information.
General education philosophy statement
Mathematics and Statistics courses help students gain tools to analyze and solve problems using numerical and abstract reasoning. Students will develop their abilities to reason quantitatively by working with numbers, operations, and relations and to reason qualitatively by analyzing patterns and making generalizations.
Course Activities and Design
All activities will follow the premise that formal definitions and procedures evolve from the investigation of practical problems. Concepts will be introduced using lecture, group activities, calculator programs, and/or computer laboratory explorations. Students will communicate their results.
Outcome Assessment Strategies
Assessment must include:
 At least two inclass or proctored examinations and
 At least two of the following additional measures:
 takehome examinations.
 graded homework / worksheets.
 quizzes.
 writing assignments.
 group / individual projects.
 inclass activities.
Course Content (Themes, Concepts, Issues and Skills)
 Random Variables and Probability Distributions
The instructional goal is to explore and analyze various random variables and probability distributions. Explore probability distributions:
 Normal.
 Student's t.
 F.
 Chisquare χ2
 Explore probability distributions:

Estimation: one sample
The instructional goal is to estimate a population parameter by calculating a confidence interval. Identify and describe terminology:
 confidence coefficient (critical zscore)
 confidence level
 point estimator
 Check the conditions associated with a confidence interval for:
 a population mean.
 a population proportion.
 Calculate and interpret a confidence interval for:
 a population mean.
 a population proportion.
 Calculate a sample size to attain a desired margin of error and confidence level.
 Using technology, input a sample and execute the commands to create a confidence interval; interpret the output.
 Identify and describe terminology:
 Statistical Inference: one sample
The goal is to utilize sample information to test whether a population parameter is less than, not equal to, or greater than a specified value. Perform a hypothesis test using:
 a test of significance.
 a confidence interval.
 Identify and contextually interpret terminology:
 null and alternative hypotheses.
 test statistic.
 Type I and Type II errors, α and β.
 observed significance level: Pvalue.
 Check the conditions associated with a test of significance about:
 a population mean.
 a population proportion.
 Conduct and interpret a ztest about a population mean. (Optional)
 Conduct and interpret a ttest about a population mean.
 Conduct and interpret a ztest about a population proportion.
 Using technology, input a sample and execute the commands to perform a ttest or a ztest; interpret the output.
 Calculate and interpret the power of a z or ttest.
 Perform a hypothesis test using:
 Estimation and Statistical Inference: two samples
The instructional goal is to utilize sample information to infer whether a difference exists between two population means or two population proportions. Perform a hypothesis test using:
 a test of significance.
 a confidence interval.
 Check the conditions associated with a confidence interval or test of significance about:
 the difference between two population means using two independent samples.
 the difference between two population proportions using two independent samples.
 the difference between two population means using paired samples.
 Construct and interpret a confidence interval about:
 the difference between two population means using two independent samples.
 the difference between two population proportions using two independent samples.
 the difference between two population means using paired samples.
 Conduct and interpret:
 a ttest about the difference between two population means using two independent samples.
 a ztest about the difference between two population proportions using two independent samples.
 a ttest about the difference between two population means using paired samples.
 Using technology, input two independent samples and execute the commands to construct:
 a twosample difference of means confidence interval; interpret the output.
 a twosample difference of proportions confidence interval; interpret the output.
 Using technology, input two independent samples and execute the commands to perform:
 a twosample difference of means test; interpret the output.
 a twosample difference of proportions test; interpret the output.
 Using technology, input two paired samples and execute the commands to:
 perform a onesample confidence interval; interpret the output.
 perform a onesample ttest; interpret the output.
 Perform a hypothesis test using:
 Analysis of Variance (ANOVA)
The instructional goal is to design and analyze a sampling experiment to compare the means of more than two populations. Identify and describe terminology:
 response (dependent) variable.
 factor (independent variable, stimulus).
 levels (treatments) of a factor.
 sum of squares for treatments (SST) and error (SSE).
 mean square for treatments (MST) and error (MSE).
 Check the conditions associated with an ANOVA test.
 Compare the treatment means.
 Summarize the results of the F test in an ANOVA table.
 Using technology, input sample data and execute the commands to perform ANOVA; interpret the output.
 Use a multiple comparisons method to determine which pairs of means differ; interpret the results.
 Identify and describe terminology:
 ChiSquare χ2 Tests and Contingency Tables
The instructional goal is to explore a nonparametric procedure on categorical variables. Identify and describe terminology:
 contingency table.
 marginal probabilities.
 Check the conditions for and perform a goodnessoffit test, test of independence, and test of homogeneity.
 Determine whether two classifications of nominal data are independent using a contingency table and a Chisquare (χ2) test.
 Using technology, input sample data, choose commands to perform an appropriate Chisquare (χ2) test; interpret the output.
 Identify and describe terminology:
 Simple Linear Regression and Correlation
The instructional goal is to explore a straightline relationship between two random variables, and use the leastsquares line as a basis for inference about a population from which our observations are a sample. Identify the explanatory variable and the response variable.
 Check the conditions associated with constructing a leastsquares linear regression model, and construct such a model.
 Construct a scatter plot of the sample data.
 Identify the leastsquares estimates of the intercept and the slope (the parameters) of the population regression model.
 Specify the probability distribution of the random error term, and estimate the standard deviation of this distribution.
 Evaluate the utility of the model:
 conduct a test of significance to determine whether the data provide sufficient evidence to indicate that the explanatory variable contributes information for the linear prediction of the response variable.
 Construct and interpret a confidence interval to estimate the slope of the population regression model.
 Use technology to calculate and interpret the sample correlation coefficient r.
 Use technology to calculate and interpret the coefficient of determination r2 as a percentage.
 Construct and interpret a residual plot using technology.
 Use the leastsquares line for estimation and prediction:
 Using technology, construct and interpret a confidence interval for the mean value of the response variable when the explanatory variable takes on a specific value.
 Using technology, construct and interpret a prediction interval for an individual value of the response variable when the explanatory variable takes on a specific value.
 Using technology, input sample data and execute the commands to produce a leastsquares regression equation, a fitted line, a residual plot, and r2; interpret the output.
Recommended:
 Plus Four Estimates
The instructional goal is to explore alternative procedures for confidence intervals for proportions when sample sizes are small. Check the conditions associated with plus four estimates of a single population proportion and plus four estimates of a difference in two population proportions.
 Calculate and interpret a plus four estimate of a single population proportion, and a plus four estimate of the difference in two population proportions.
If time permits, the instructor may supplement the core required competencies with no more than two of the following topics.
 TwoWay ANOVA
The instructional goal is to classify several populations according to two categorical variables and compare the means. Reduce the residual variation in a model by including a second factor thought to influence the response. Compare the treatment means using:
 randomized block design.
 factorial design.
 Create and interpret an interaction plot.
 Conduct and interpret a significance test on interaction.
 Conduct and interpret significance tests on the main effects of each factor on the response variable.
 Using technology, input sample data and execute the commands to perform twoway ANOVA; interpret the output.
 Compare the treatment means using:
 Statistical Process Control
The instructional goal is to explore processcontrol techniques to improve quality and reduce waste. Identify and describe terminology:
 upper and lower control limits (UCL and LCL).
 consumer and producer risks.
 Construct control charts for measurement data, such as time elapsing from the start of a process to its end.
 Plot and interpret an xbar chart.
 Plot and interpret an schart.
 Plot and interpret an Rchart.
 Construct control charts for attribute (count) data, such as the number of purchase orders that contain one or more errors by plotting and interpreting a pchart.
 Explore acceptance sampling by constructing and interpreting an OC curve.
 Using technology, input sample data and execute the commands to produce qualitycontrol charts; interpret the output.
 Identify and describe terminology:
 TimeSeries Analysis
The instructional goal is to analyze data that are collected over time and to explore methods for forecasting. Compute and interpret an index number.
 Laspeyres.
 Paasche.
 Fisher.
 Study the Consumer Price Index.
 Perform timeseries analysis.
 Identify and describe terminology:
 longterm trend.
 seasonal, cyclical, and irregular variation.
 Construct moving averages to smooth out random variation.
 Determine the linear trend equation to show steady upward (downward) movement.
 Determine a set of seasonal indexes.
 Deseasonalize data using seasonal indexes.
 Determine a seasonally adjusted forecast.
 Identify and describe terminology:
 Input sample data and execute the commands to display a timeseries plot, determine a linear trend equation, and display estimates for future time periods; interpret the output.
 Compute and interpret an index number.
 Decision Theory
The instructional goal is to explore the economic consequences and the probabilities of realizing them to determine which of several courses of action is best. Identify and describe terminology:
 decision alternatives (actions).
 payoff values (utility).
 expected payoff values.
 minimax, maximin, minimum, and maximax strategies.
 EVPI.
 Portray a decision analysis problem.
 Construct and interpret a decision tree.
 Construct and interpret a payoff table.
 Construct and interpret an opportunity loss table.
 Identify and describe terminology:
 Additional Nonparametric Statistics
The instructional goal is to explore distributionfree techniques for a test of central tendency, a test of the difference between two sampled populations, a test of the association between two variables, and a test for comparing more than two populations. Conduct and interpret the Sign test for a population median.
 Conduct and interpret the Wilcoxon rank test for comparing two independent samples.
 Conduct and interpret the Wilcoxon rank test for comparing two paired samples.
 Calculate the Spearman rank correlation coefficient between two sets of ranked data.
 Conduct and interpret the KruskalWallis rank test for onefactor ANOVA.
 Conduct and interpret the Friedman rank test for twofactor ANOVA.
 Using technology, input sample data and execute the commands to perform an appropriate nonparametric test; interpret the output.