To assess student understanding of learning outcomes, we wrote online homework assignments for each of our 27 topics. The complete database consists of over 1200 questions across the 27 topics and is currently available in two formats: MS Word files and Respondus archive files for upload to the CMS Blackboard. Question formats include multiple choice, multiple answer, matching, true/false, fill in the blank, and drop down menu question formats.
The online homework question database includes multiple questions for almost all of the 218 learning outcomes. Questions assessing the same aspect of a learning outcome are grouped into question sets, with the database containing at least one question set for each learning outcome. Unique homework assignments are created for each student by randomly selecting a fixed number of questions from each question set.
Questions in the database are identified by topic, learning outcome, question set, question type, and number of points possible. Student responses can be downloaded from Blackboard and the ePort package used to summarize student performance across topics, learning outcomes, question sets and questions.
Click on the outcomes below to view some example questions from Topics 06 and 19.
In a sample of 25 male newborns, the mean birth weight was 3.4 kg and the standard deviation was 0.35 kg.
The z-score for a birth weight of 2.3 kg is . Round your answer to 2 decimal places.
Use a z-table or applet to answer the following question: Assume the distribution of IQ scores for adults can be modeled with a normal model with a mean score of 100 points and a standard deviation of 10 points. What percentage of adults have an IQ score of less than 87 points?
| a. 4.46% |
| b. 15.15% |
| c. 9.68% |
| d. 90.32% |
| e. 84.85% |
A random sample of 176 seed harvester ants is selected. The sample mean weight of the ants is 58.5 mg with a sample standard deviation of 10.22 mg.
The 98% confidence interval for the population mean is (56.73 mg, 60.34 mg). Select the correct interpretation of this confidence interval.
| a. We are 98% confident that the sample mean weight of the seed harvester ants is between 56.73 mg and 60.34 mg. |
| b. 98% of all seed harvester ants will weigh between 56.73 mg and 60.34 mg. |
| c. We are 98% confident that the mean weight of the population of seed harvester ants is between 56.73 mg and 60.34 mg. |
| d. The mean weight of the population of seed harvester ants is between 56.73 mg and 60.34 mg. |
All other things being equal, a confidence interval for the population mean will be wider than a confidence interval for the same population mean.
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