A business travel magazine wants to classify airports on a variety of service variables on a 0-10 scale. A score of 0 is the lowest mark and a score of 10 the highest mark. Airports that receive a score of 7 or higher 'might be' designated superior airports. The magazine staff surveyed a sample of 60 business travelers at each airport to obtain ratings data. The sample for London's Heathrow airport provided a sample mean rating of x-bar = 7.25 and a sample standard deviation of 1.052. The null hypothesis would be U < = 7, and the alternative U > 7. What is the T-value associated with this test?
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.
A business travel magazine wants to classify airports on a variety of service variables on a 0-10 scale. A score of 0 is the lowest mark and a score of 10 the highest mark. Airports that receive a score of 7 or higher 'might be' designated superior airports. The magazine staff surveyed a sample of 60 business travelers at each airport to obtain ratings data. The sample for London's Heathrow airport provided a sample mean rating of x-bar = 7.25 and a sample standard deviation of 1.052. The null hypothesis would be U < = 7, and the alternative U > 7. What is the T-value associated with this test?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
