7. A small town has two radio stations, an AM station and an FM station. A survey of 150 town residents produced the following results: In the last 30 days, 70 people have listened to the AM station, 67 have listened to the FM station, and 30 have listened to both stations. (A) During this 30-day period, how many people in the survey have listened to the AM station but not to the FM station? (B) How many have listened to the FM station but not to the AM station? (C)How many have not listened to either station?
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.
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