You may need to use the appropriate technology to answer this question. A magazine subscriber study asked, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" A second question asked if the type of airline ticket purchased most often was for domestic or international travel. Sample data obtained are shown in the following table. Type of Ticket Type of Flight Domestic International First class 29 22 Business class 94 120 Economy class 519 136 Using a 0.05 level of significance, is the type of ticket purchased independent of the type of flight? Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value =
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
| Type of Ticket | Type of Flight | |
|---|---|---|
| Domestic | International | |
| First class | 29 | 22 |
| Business class | 94 | 120 |
| Economy class | 519 | 136 |
Using a 0.05 level of significance, is the type of ticket purchased independent of the type of flight?
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