A graduate-level computer science course only gives the grades of A, B, or C.The department has determined that there should be 40% A's given, 40% B's given and 20% C'sgiven as final grades for the course. For the spring 2021 semester, 200 students took the courseand 100 students received A's, 50 students received B's and 50 students received C's, so those aremy observed frequencies. We want to do a Chi-square Multinomial Goodness of Fit test to see ifour grading guidelines match up with what is actually happening.What is the correct number of degrees of freedom for this hypothesis test?

Answered: A graduate-level computer science…

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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Students were asked what grades they usually get in school. For twelfth-grade students who responded to this question and the question about how often they wear seatbelts when driving, a summary of frequency counts for combinations of responses to the two questions is as follows. WearsSeatbelt Usual School Grades A and B C D and F Total Never 55 40 17 112 Rarely 129 95 21 245 Sometimes 168 109 9 286 Most times 290 129 25 444 Always 1,059 305 50 1,414 Total 1,701 678 122 2,501 (a) The total number of students in the table is 2,501. What percentage of these 2,501 students said that they usually get A's and B's in school? (Round your answer to one decimal place.) % (b) What percentage of the 1,701 students who said that they usually get A's and B's said that they always wear a seatbelt when driving? (Round your answer to one decimal place.) % (c) What percentage of the 678 students who said that they usually get C's said that they always wear a…
4). Using the data in the question #2, construct a histogram and then construct a frequency polygon.
A graduate-level computer science course only gives the grades of A, B, or C. The department has determined that there should be 40% A's given, 40% B's given and 20% C's given as final grades for the course. For the spring 2021 semester, 200 students took the course and 100 students received A's, 50 students received B's and 50 students received C's, so those are my observed frequencies. We want to do a Chi-square Multinomial Goodness of Fit test to see if our grading guidelines match up with what is actually happening. What is the expected frequency for the grade of B category? Round your answer to the tenths position.
A researcher who studies mental health is interested in the length of time (in days) that a patient stays in the hospital after they have presented to emergency having suicidal ideation. The researcher follows the first 30 patients during the month of January and follows them until each one of them is released. Below is the histogram of the data obtained from the 30 patients. 1. What is the shape of this distribution and please construct a frequency table. Given the shape and type of data, which measure of central tendency would you be more likely to report? Why?
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