A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 95.3- cm and a standard deviation of 0.9-cm. For shipment, 46 steel rods are bundled together. Round all answers to four decimal places if necessary. a. What is the distribution of X? X N( b. What is the distribution of a? N( c. For a single randomly selected steel rod, find the probability that the length is between 95.2-cm and 95.4-cm.
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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