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(c) Compute the expected frequencies. Grade Expected Part: 3 / 9 Part 4 of 9 A Grade A B C D F 18 B 24 C 36 D O 18 (d) Which grades were given more often than expected? Which grades were given less often than expected? More Often Less Often O O O O O F X 24

(c) Compute the expected frequencies. Grade Expected Part: 3 / 9 Part 4 of 9 A Grade A B C D F 18 B 24 C 36 D O 18 (d) Which grades were given more often than expected? Which grades were given less often than expected? More Often Less Often O O O O O F X 24

MATLAB: An Introduction with Applications
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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(c) Compute the expected frequencies. Grade Expected Part: 3 / 9 Part 4 of 9 A Grade A B с D F 18 B 24 C 36 D 18 (d) Which grades were given more often than expected? Which grades were given less often than expected? More Often Less Often F 24 5
Transcribed Image Text:(c) Compute the expected frequencies. Grade Expected Part: 3 / 9 Part 4 of 9 A Grade A B с D F 18 B 24 C 36 D 18 (d) Which grades were given more often than expected? Which grades were given less often than expected? More Often Less Often F 24 5
Grade distribution: A statistics teacher claims that, on the average, 15% of her students get a grade of A, 20% get a B, 30% get a C, 15% get a D, and 20% get an F. The grades of a random sample of 120 students were recorded. The following table presents the results. Test the hypothesis that the grades follow the distribution claimed by the teacher. Use the 0.025 level of significance and the P-value method with the TI- 84 Plus calculator. B C D F Observed 6 22 37 23 32 Grade Send data to Excel Part 1 of 9 (a) How many of the students in the sample got an F? How many got a C? The number of students who got an F is 32 The number of students who got a C is 37 Part 2 of 9 (b) State the null and alternate hypotheses. = Ho: P₁ = 0.15, P₂= 0.20, p=0.3, P4-0.15, Ps= 0.20 H₁: Some or all of the actual probabilities differ from those specified by Ho
Transcribed Image Text:Grade distribution: A statistics teacher claims that, on the average, 15% of her students get a grade of A, 20% get a B, 30% get a C, 15% get a D, and 20% get an F. The grades of a random sample of 120 students were recorded. The following table presents the results. Test the hypothesis that the grades follow the distribution claimed by the teacher. Use the 0.025 level of significance and the P-value method with the TI- 84 Plus calculator. B C D F Observed 6 22 37 23 32 Grade Send data to Excel Part 1 of 9 (a) How many of the students in the sample got an F? How many got a C? The number of students who got an F is 32 The number of students who got a C is 37 Part 2 of 9 (b) State the null and alternate hypotheses. = Ho: P₁ = 0.15, P₂= 0.20, p=0.3, P4-0.15, Ps= 0.20 H₁: Some or all of the actual probabilities differ from those specified by Ho
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