City City Starbucks Starbucks Riverside Ontario 18 12 Grand Terrace Norco 4 Fontana Mira Loma Rialto Colton San Bernardino Perris Highland Rancho Cucamonga Lake Elsinore Moreno Valley 3 Redlands 1 Corona Yucaipa Chino 10 10 3 11 Upland Bloomington Montclair 1
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.
The number of Starbucks coffee shops in cities within 20 miles of the
University of California, Riverside is shown in the following table.
See Attachment
a. Draw a dotplot to describe the data.
b. Describe the shape of the distribution.
c. Is there another variable that you could measure that might help to explain why some cities have more Starbucks than others? Explain.
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