A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B, 35% get a C, 10% get a D, and 15% get an F. The grades of a random sample of 109 students were recorded. The following table presents the results. Grade 1 3 4 5 Observed 4 31 42 13 19 What is the value of ? A) 12.317 B) 9.488 C) 11.143 D) 11.067

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A biology professor claims that, on the average, 15% of her students get a grade of A,
25% get a B, 35% get a C, 10% get a D, and 15% get an F. The grades of a random
sample of 109 students were recorded. The following table presents the results.
Grade
1
3
4
5
Observed
4
31
42
13
19
What is the value of ?
A) 12.317
B) 9.488
C) 11.143
D) 11.067
Transcribed Image Text:A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B, 35% get a C, 10% get a D, and 15% get an F. The grades of a random sample of 109 students were recorded. The following table presents the results. Grade 1 3 4 5 Observed 4 31 42 13 19 What is the value of ? A) 12.317 B) 9.488 C) 11.143 D) 11.067
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