A sales manager collected the following data on annual sales for new customer accounts and the number of years of experience for a sample of 10 salespersor Years of Annual Sales Salesperson Experience ($1,000s) 1 1 80 97 4 92 4 4 102 6 103 8 111 10 119 8. 10 123 11 117 10 13 136 (a) Develop a scatter diagram for these data with years of experience as the independent variable. 150- 150 140 140 130- 130 120 110- 120 110 100 - 100 90 90 1 Sales ($1,000s) al Sales ($1,000s)
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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