1. In a chi-squared goodness-of-fit test, there are four categories and 200
observations. Use the significance level 0.05.
a. How many degrees of freedom are there?
b. What is the critical value of chi-square?
2. A Spanish teacher administers to his group of 25 students a standardized grammar test, in which he obtains the foll owing results
2. A Spanish teacher gives his group of 25 students a standardized grammar test, in which he obtains the following results:
56 58 40 77 87 75 61 70 73 71 66 69 67 68 60 72 73 61 64 66 84 72
52 65 67
Perform a Kolmogorov-Smirnov goodness-of-fit test in order to compare the group’s results with the standards.
compare the group’s results with national standards. The manual for the
The test manual indicates that the deciles of the scores for high school students
are as follows:
1.
are as follows:
Decile 1 2 3 4 5 6 7 8 9
Score 45.0 56.8 62.5 66.1 68.7 71.3 74.0 78.5 84.2
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