find the mean of the data summarized in the given frequency distribution. Compare and computed mean to the actual mean of 51.9 miles per hour:speed (miles per hr) Frequency42-45 2146.49 1250-53 754-57 458-61 2The mean of the frequency is _____What is the relationship between the computed mean and the actual mean?
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.
find the
speed (miles per hr) Frequency
42-45 21
46.49 12
50-53 7
54-57 4
58-61 2
The mean of the frequency is _____
What is the relationship between the computed mean and the actual mean?
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