Question
In: Statistics and Probability
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to help mildly mentally retarded children learn to read. In the experiment, Form 2 of the Gates-MacGintie Reading Test was administered to both an experimental group and a control group after 6 weeks of instruction, during which the experimental group received peer tutoring and the control group did not. For the experimental group n1 = 30 children, the mean score on the vocabulary portion of the test was x1 = 368.4, with sample standard deviation s1 = 39.5. The average score on the vocabulary portion of the test for the n2 = 30 subjects in the control group was x2 = 348.6 with sample standard deviation s2 = 56.2.
(a) Use a 1% level of significance to test the claim that the experimental group performed better than the control group.
(b) What is the level of significance?
(c)What is the value of the sample test statistic? Compute the corresponding z or t value as appropriate. (Test the difference μ1 − μ2. Round your answer to three decimal places.)
(d) Find a 98% confidence interval for μ1 − μ2. (Round your answers to two decimal places.)
| lower limit ? | |
| upper limit ? |
Solutions
orchestra answered 2 years agoRelated Solutions
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported the
results of a peer tutoring program to help mildly mentally retarded
children learn to read. In the experiment, the mildly retarded
children were randomly divided into two groups: the experimental
group received peer tutoring along with regular instruction, and
the control group received regular instruction with no peer
tutoring. There were n1 = n2 = 31 children in each group. The
Gates-MacGintie Reading Test was given to both groups before
instruction...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported
the results of a peer tutoring program to help mildly mentally
retarded children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the
vocabulary portion of...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported the
results of a peer tutoring program to help mildly mentally retarded
children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the vocabulary portion of...
In the journal Mental Retardation, an article reported the results of a peer tutoring program to...
In the journal Mental Retardation, an article reported
the results of a peer tutoring program to help mildly mentally
retarded children learn to read. In the experiment, Form 2 of the
Gates-MacGintie Reading Test was administered to both an
experimental group and a control group after 6 weeks of
instruction, during which the experimental group received peer
tutoring and the control group did not. For the experimental group
n1 = 30 children, the mean score on the
vocabulary portion of...
Defined Mental Retardation. Analyse the levels of Mental Retardation.
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as ? (in percentage).
? 4.4 6.6 9.7 10.6 10.8 10.9
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revealed a significant t12 = 1.8, with σˆX1−X2 = 2. If there were 8
participants in the experimental group,
(a) how many participants were in the corresponding control
group?
(b) what significance level was used, and was the test a
one-tailed or a two-tailed test?
(c) what was the mean difference between the experimental and
the control groups?
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