Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 46.4 miles per hour. Speed (miles per hour) 42−45 46−49 50−53 54−57 58−61 Frequency 29 13 6 4 1 The mean of the frequency distribution is
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.
|
Speed (miles per hour)
|
42−45
|
46−49
|
50−53
|
54−57
|
58−61
|
|
|---|---|---|---|---|---|---|
|
Frequency
|
29
|
13
|
6
|
4
|
1
|
|
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