A Student Is Interested in Whether Students Who Study with Others

question 12

Essay

A student is interested in whether students who study with others devote at much attention to their studies as do students who study alone. He believes those who study alone devote more attention to their studies. He randomly assigns participants to either group or individual study conditions and has them read and study the same passage of information for the same amount of time. Participants are then all given the same 10-item test on the material. Their scores appear below. Scores on the test represent interval/ratio data and are normally distributed.

a) What statistical test should be used to analyze these data?
b) Identify H₀ and H_a for this study.
c) Conduct the appropriate analysis.
d) Should H₀ be rejected? What should the researcher conclude?
e) If significant, compute the effect size and interpret this.
f) If significant, draw a graph representing the data.
g) Calculate the 95% CI.

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Definitions:

Direct Labor-Hours

All the hours contributed by workers directly participating in creating products.

Activity Cost Pools

Aggregations of overhead costs attributed to distinct activities, used in activity-based costing to assign costs more precisely to products or services.

Activity-Based Costing

An accounting method that assigns costs to products or services based on the activities and resources that go into producing them.

Direct Materials Cost

The cost of raw materials and components that are directly traceable to the production of goods.