The table below includes reading test scores for 30 students in a 6 th grade cla
ID: 3353578 • Letter: T
Question
The table below includes reading test scores for 30 students in a 6th grade class. Follow the steps outlined in the Corder & Foreman’s textbook (pp. 24-27) to examine the sample’s skewness and kurtosis for normality for an alpha () level of .05. Your response should be organized according to those steps. Report your findings. (10 points) (5 points each for skewness and kurtosis. For each 5 points= 2 points for SPSS Printout, 2 points for Z, and 1 point for interpretation)
Sixth-Grade Reading Test Scores
79 74 78 70 80 72 75 80 83 80
74 73 70 74 81 75 81 82 76 71
76 74 81 74 74 77 76 74 80 76
Explanation / Answer
Result:
The table below includes reading test scores for 30 students in a 6th grade class. Follow the steps outlined in the Corder & Foreman’s textbook (pp. 24-27) to examine the sample’s skewness and kurtosis for normality for an alpha () level of .05. Your response should be organized according to those steps. Report your findings. (10 points) (5 points each for skewness and kurtosis. For each 5 points= 2 points for SPSS Printout, 2 points for Z, and 1 point for interpretation)
Sixth-Grade Reading Test Scores
79 74 78 70 80 72 75 80 83 80
74 73 70 74 81 75 81 82 76 71
76 74 81 74 74 77 76 74 80 76
Descriptive Statistics
N
Minimum
Maximum
Skewness
Kurtosis
Statistic
Statistic
Statistic
Statistic
Std. Error
Statistic
Std. Error
Reading Test Scores
30
70.00
83.00
0.100
0.427
-0.969
0.833
Valid N (listwise)
30
Tests of Normality
Kolmogorov-Smirnova
Shapiro-Wilk
Statistic
df
Sig.
Statistic
df
Sig.
Reading Test Scores
0.142
30
0.124
0.947
30
0.137
a. Lilliefors Significance Correction
SPSS output of the Kolmogorov-Smirnov and the Shapiro-Wilk tests. For both tests the p-value is greater than 0.05 so we would accept the null hypothesis that the data come from a normally-distributed population.
Descriptive Statistics
N
Minimum
Maximum
Skewness
Kurtosis
Statistic
Statistic
Statistic
Statistic
Std. Error
Statistic
Std. Error
Reading Test Scores
30
70.00
83.00
0.100
0.427
-0.969
0.833
Valid N (listwise)
30
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