Question

a group of third grade students is taught using a new curriculum. a control group of third grade students is taught using the old curriculum. the reading test scores for the two groups are shown in the back - to - back stem - and - leaf plot. at α = 0.10, is there enough evidence to support the claim that the new method of teaching reading produces higher reading test scores than the old method does? assume the population variances are equal. complete parts (a) through (e) below. assume the samples are random and independent, and the populations are normally distributed. (a) identify the claim and state h₀ and hₐ. which is the correct claim below? a. \the new method of teaching reading produces lower reading test scores than the old method.\ b. \the new method of teaching reading produces higher reading test scores than the old method.\ c. \the new method of teaching reading produces different reading test scores than the old method.\ d. \the new method of teaching reading produces equal reading test scores as the old method.\ old curriculum new curriculum 7 | 3 | 4 0 | 4 | 8 9 9 7 6 6 3 3 0 | 5 | 1 2 9 8 6 4 2 1 0 0 | 6 | 0 0 1 2 2 3 5 5 8 8 8 9 | 7 | 0 0 1 5 6 6 8 9 | 8 | 3 8 key: 4|7|0 = 74 old and 70 new

Explanation:

The problem's claim is that the new method produces higher reading test scores than the old method. Option B matches this claim. Options A (lower), C (different), and D (equal) do not align with the stated claim in the problem.

Answer:

B. "The new method of teaching reading produces higher reading test scores than the old method."