Proportions for the two commercials

Assignment Help Basic Statistics

Reference no: EM1314348

1. The Bureau of Transportation tracks the flight arrival performances of the ten biggest airlines in the U.S. Flights that arrive within fifteen minutes of schedule are considered "on time" (Imagine that!!). The following data shows the arrival statistics for these airlines for January 2001 and January 2002, respectively:

Jan 2001: of 924 flights, 742 arrived "on time"

Jan 2002: of 841 flights, 714 arrived "on time"

Using alpha = .05 and a computed value of -2.54, determine whether or not the major airlines improved their on-time flight performances during the one-year period.

2. In a test of the quality of 2 TV commercials each commercial was shown in separate test area 6 times over a one - week period.

The next wee, a phone survey was conducted to identify the people who had seen the commercials? Those people were asked to state the main message in the commercials. The results are as follows:

	Commercial A	Commercial B
Number who saw the commercial	150	200
Number who recalled the main message	63	60

If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?

Reference no: EM1314348

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