Casio ALGEBRA FX2.0 Advanced Statistics Examples 1 Manuel d'utilisateur télécharger pdf (Page 23)

examples

Example 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 ten patterns to identify. In setting A, the

child is given praise for each correct answer and no comment about

wrong answers. In setting B, the child is given criticism for each

wrong answer and no comment about correct answers. In setting C,

the child is given no praise or criticism but the observer expresses

interest in what the child is doing. In setting D, 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. The test scores (number

correct) for each group follow. Find F0.01, the critical values for an α =

0.01 level of significance. Does the test indicate we should accept or

reject the null hypothesis?

Group A = {10, 8, 7, 9, 11}

Group B = { 2, 5, 3, 3, 4}

Group C = { 9, 3, 7, 8, 5, 6}

Group D = { 5, 7, 3, 6, 7}

Procedure

1 m STAT2

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dwdwdwdwdwdwewewewewew

bawiwhwjwbbwcwfwdwdwew

jwdwhwiwfwgwfwhwdwgwhw

3 3(TEST) f(ANOVA)

4 1(1)c

1(LIST) bwc

1(LIST) cwc

1(None) c

5 1(CALC)

Result Screen

Since P = 7.992708666e-4 < 0.01 (level of significance), we can reject the null hypothesis

and conclude that the laboratory setting affects the mean score.

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Casio ALGEBRA FX2.0 Advanced Statistics Examples 1 Manuel d'utilisateur Page 23