(a) What are the null and alternate hypotheses? 0.001 0.010 (b) Suppose the P-value is approximately 0.0048, conclude the test using a (a=0.01) 1% level of significance. Does the test indicate that we should reject or fail to reject the null hypothesis? Explain.
(a) What are the null and alternate hypotheses? 0.001 0.010 (b) Suppose the P-value is approximately 0.0048, conclude the test using a (a=0.01) 1% level of significance. Does the test indicate that we should reject or fail to reject the null hypothesis? Explain.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:10. A psychologist is studying pattern-recognition skills under four
laboratory settings. In each setting, a fourth-grade child is given a
pattern-recognition test with 10 patterns to identify. In setting I, the
child is given praise for each correct answer and no comment about
wrong answers. In setting II, the child is given criticism for each wrong
answer and no comment about correct answers. In setting III, the child
is given no praise or criticism, but the observer expresses interest in
what the child is doing. In setting IV, the observer remains silent in an
adjacent room watching the child through a one-way mirror. A random
sample of fourth-grade children was used, and each child participated in
the test only once.
Because each of the groups comes from independent random samples (no child
was tested twice), we need assume only that each group of data came from a
normal distribution, and that all the groups came from distributions with about the
same standard deviation.
Group I (Praise)
Group II (Criticism)
Group III (Interest)
Group IV (Silence)
n, = 5
n2 = 4
n3 = 6
n4 = 5
X1
X2
x3
X3
X4
6.
81
4
9.
81
25
8
64
25
6.
7
49
8
64
16
49
9.
6.
81
9.
8.
64
6.
36
49
25
7.
49
6.
36
Ex1
= 41
Ex2
= 14
Ex3
= 38
EX4
28
339
54
= 264
= 168
(a) What are the null and alternate hypotheses?
0.001
0.010
(b) Suppose the P-value is approximately 0.0048, conclude the test using a
(a=0.01) 1% level of significance. Does the test indicate that we should
reject or fail to reject the null hypothesis? Explain.
1254 3
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