A supervisor of a plant kept records of the time (in seconds) that employees needed to complete a particular task. The data are summarized as follows:Time 30 < 40 40 < 50 50 < 60 60 < 80 8 < 100 100 < 150Number 10 15 20 30 24 20a. Graph the data with a histogram.b. Discuss possible errors.
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.
A supervisor of a plant kept records of the time (in seconds) that employees needed to complete a particular task. The data are summarized as follows:
Time 30 < 40 40 < 50 50 < 60 60 < 80 8 < 100 100 < 150
Number 10 15 20 30 24 20
a. Graph the data with a histogram.
b. Discuss possible errors.
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