In a survey conducted in November 2002 of 1400 international business travelers

Question

In a survey conducted in November 2002 of 1400 international business travelers concerning in-flight service over the past few years, the following information was obtained:
Comments on Quality of Service | Respondents Has remained the same from 2 yrs ago | 630 Has diminished over that time frame | 406 Has improved over that time frame | 336 Wasn't sure | 28
If a person in the survey is chosen at random, what is the probability that he or she has rated in-flight service as: Remaining the same or improved over the time frame in question? Remaining the same or diminished over the time frame in question?
In a survey conducted in November 2002 of 1400 international business travelers concerning in-flight service over the past few years, the following information was obtained:
Comments on Quality of Service | Respondents Has remained the same from 2 yrs ago | 630 Has diminished over that time frame | 406 Has improved over that time frame | 336 Wasn't sure | 28
If a person in the survey is chosen at random, what is the probability that he or she has rated in-flight service as: Remaining the same or improved over the time frame in question? Remaining the same or diminished over the time frame in question?
In a survey conducted in November 2002 of 1400 international business travelers concerning in-flight service over the past few years, the following information was obtained:
Comments on Quality of Service | Respondents Has remained the same from 2 yrs ago | 630 Has diminished over that time frame | 406 Has improved over that time frame | 336 Wasn't sure | 28
If a person in the survey is chosen at random, what is the probability that he or she has rated in-flight service as: Remaining the same or improved over the time frame in question? Remaining the same or diminished over the time frame in question?

Explanation / Answer

In a survey conducted in November 2002 of 1400 international business travelers

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