On average, Upstate Chevrolet sells 20 cars each week, with a standard deviation of 2. How many cars sold represents 2 standard deviations above the mean? Answer How many cars sold represent 1 standard deviation below the mean? Answer Approximately 68% will fall between Answer and Answer . Approximately 99.7% will fall between Answer and Answer . What is the probability that the car lot will sell at least 18 cars? Answer %
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.
On average, Upstate Chevrolet sells 20 cars each week, with a standard deviation of 2.
How many cars sold represents 2 standard deviations above the mean? Answer
How many cars sold represent 1 standard deviation below the mean? Answer
Approximately 68% will fall between Answer
Approximately 99.7% will fall between Answer
What is the probability that the car lot will sell at least 18 cars? Answer
What is the probability that a car lot will sell at most 26 cars? Answer
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