An Article Describes the Results of an Experiment

question 10

Multiple Choice

An article describes the results of an experiment. Students were randomly assigned to the two groups. One group was a control group of students who used source A while preparing for the test. Of the 54 students in this group, 31 passed the test. Those in the second group used source B while preparing for the test. Of the 48 students in the supplement group, 17 passed the test. Construct and interpret a 95% confidence interval for the difference in the proportion of students who passed the test using source A and the proportion of students who passed the test using source B.

• A)CI: ; Because both endpoints of the interval are negative, you would conclude that the proportion of students who passed the test using source B is greater than the proportion of students who passed the test using source A by somewhere between 0.139 and 0.301.
• B)CI: ; Because both endpoints of the interval are negative, you would conclude that the proportion of students who passed the test using source B is greater than the proportion of students who passed the test using source A by somewhere between 0.031 and 0.409.
• C)CI: ; Because 0 is included in the confidence interval, you can conclude that the proportion of students who passed the test using source A and the proportion of students who passed the test using source B could be equal.
• D)CI: ; Because both endpoints of the interval are positive, you would conclude that the proportion of students who passed the test using source A is greater than the proportion of students who passed the test using source B by somewhere between 0.031 and 0.409.
• E)CI: ; Because both endpoints of the interval are positive, you would conclude that the proportion of students who passed the test using source A is greater than the proportion of students who passed the test using source B by somewhere between 0.139 and 0.301.

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Definitions:

Direct Manufacturing Cost

Costs that are directly attributable to the production of a specific product, including direct materials and direct labor.

Indirect Manufacturing Cost

Costs related to production that are not directly associated with the product, such as maintenance, supervision, and utilities.

Incremental Manufacturing Cost

The additional cost incurred to produce one more unit of a product, often considered for decision-making in production processes.

Product Costs

Costs that are directly associated with the creation of a product, including direct materials, direct labor, and manufacturing overhead.