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 a= 0.01, is there enough evidence to support the claim that the 999997416011125789999 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. Old New Curriculum Curriculum 33 6047 76654310569 700066679 857 Key: 4|7|0 = 74 Old and 70 New

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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 a= 0.01, 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.
Old
Curriculum
New Curriculum
33
6047
76654310569
999997416011125789999
700066 679
857
Key: 4|7|0 = 74 Old and 70 New
CA. t< -to
O B. t>to
OC. t< -to, t> to
D. -to <t<to
(c) Find the standardized test statistic.
t%3=
| (Type an integer or decimal rounded to three decimal places as needed.)
Transcribed Image Text: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 a= 0.01, 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. Old Curriculum New Curriculum 33 6047 76654310569 999997416011125789999 700066 679 857 Key: 4|7|0 = 74 Old and 70 New CA. t< -to O B. t>to OC. t< -to, t> to D. -to <t<to (c) Find the standardized test statistic. t%3= | (Type an integer or decimal rounded to three decimal places as needed.)
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