Effectiveness of a new method of teaching algebra

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Reference no: EM13965268

An experiment is conducted comparing the effectiveness of a new method of teaching algebra for eighth-grade students. Twelve gifted and 12 regular students are taught using this method. Their scores on a ?nal exam are shown in the following table.

Average	58	69	55	65	88	52	99	76	45	86	55	79
Gifted	77	86	84	93	77	91	87	95	68	78	74	58

(a) Compute the 95% con?dence interval on the difference between the mean of the students being taught by this new method.

(b) Construct a 95% con?dence interval for the ratio of variance in test scores for regular and gifted students, σ2/σ2.

1 2

(c) What are the assumptions you made in parts (a) and (b)? Are these assumptions justi?ed?

Reference no: EM13965268

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