Activity 2: Did I Get This? Category Subscribe to RSS Feed

“Did I Get This?” activities for our course materials.

Did I Get This – Hypothesis Tests for Proportions (Extra Practice)

Published: Oct 23rd, 2013

After reading an article using research done by the Organization for Economic Co-operation and Development (OECD) based in France, a statistics student decided to conduct his own study to see […]

Did I Get This – Connection between Confidence Intervals and Hypothesis Tests

Published: Oct 22nd, 2013

The UCLA Internet Report (February 2003) estimated that roughly 8.7% of Internet users are extremely concerned about credit card fraud when buying online. A study was designed in order to […]

Did I Get This – Proportions (Step 4)

Published: Oct 22nd, 2013

Two hypothesis tests were conducted. In test I, a significance level of .05 was used, and the p-value was calculated to be 0.025. In test II, a significance level of […]

Did I Get This – Proportions (Step 3)

Published: Oct 22nd, 2013

  In each of the following questions, choose the pair(s) of hypotheses for the population proportion (p) and the z statistic that match the figure. This document is linked from Proportions […]

Did I Get This – Type I and Type II Errors

Published: Mar 18th, 2013

In the following activities, you are asked to describe each type of error in context (in the words of the problem or scenario). Consider the following hypotheses, which we have […]

Did I Get This – Proportions (Step 2)

Published: Mar 17th, 2013

The UCLA Internet Report (February 2003) estimated that a proportion of roughly 0.75 of online homes are still using dial-up access, but claimed that the use of dial-up is declining. […]

Did I Get This – State Hypotheses (Proportions)

Published: Mar 17th, 2013

In each of the following examples, a test for the population proportion (p) is called for. You are asked to select the right null and alternative hypotheses. Scenario 1: When […]

Did I Get This – Proportions (Overview)

Published: Mar 8th, 2013

Using data from 2008, the American Association of Community Colleges (AACC) reports that community college students constitute 46% of all U.S. undergraduates. Given the downturn in the U.S. economy, the […]

Did I Get This – Hypothesis Testing Overview

Published: Mar 8th, 2013

Background: Based on the National Center of Health Statistics, the proportion of babies born at low birth weight (below 2,500 grams) in the United States is roughly 0.078, or 7.8% (based […]

Did I Get This – Using p-values

Published: Mar 8th, 2013

The following two hypotheses are tested: Ho: The average number of miles driven per year is 12,000. Ha: The average number of miles driven per year is less than 12,000. […]