Airlines example based upon the following srs test whether...

Airlines example: Based upon the following SRS, test whether the population proportions of on-time flights are the same for the four airlines. Test at the .05 significance level. (α = .05) Southwest United American On-time flights 140 152 168 Not on time flights 20 56 17 Total flights 160 208 185 What is the degrees of freedom? a) 2 b) 3 c) 4 d) 6

Transcript

00:01 Hi, i'm david and i'm here to help you answering your question.

00:03 In the question here, we are going to discuss about the test for equality of the publication on the late flight.

00:12 And in this question, we give it a table on the summary on the flight and late on time.

00:19 So let me go back to your question and you copy the portion of your question because i'm not allowed to copy the phone question.

00:26 Let me put the data here.

00:27 And from the table here, the first question a asked not to find the degree of freedom.

00:36 So we know that the degree of freedom, i will make this and small.

00:41 The degree of freedom is equal to the number of the levels on the flight will be latent on time, it will be the 2 minus 1, time with the number of the airline will be the 3 minus 1.

00:55 So when the 1 times the 2 and equal to the 2 degree freedom.

00:59 And this will be the answer for the a.

01:01 For the next question b, i'm going to find the value of the k -square test.

01:05 To find the k -square test, we will need to find the total.

01:10 And this one we get equal to the 39 plus 261, equal to the 300, 51 plus 249, equal to the 300, 56 plus 344, equal to the 400, this on the total as well.

01:29 39 plus 51 plus 56 equal to the 146.

01:34 This one we have 261 plus 249 plus 34 equal to the 854 and the total will be equal to the 1000.

01:49 Now this table will be called the table of the expect the observe value.

01:55 So we need to formulate the another table will be called the expected value.

02:02 So we have here will be the delta and united and the us and this one will be the late...

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