The box-and-whisker plot shows the number of residents who purchased solar panels during the first 16 years a company is in business. Interpret the box-and-whisker plot, and determine the correct conclusion. Solar Panel Sales ++H 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 Annual Number of Sales O The box shows symmetrical data. O Eight years of sales had 75 or more purchases. O Eight years of sales had 100 or more purchases. O There were between 60 and 100 purchases in 12 years of sales.
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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