sheet metal manufacturer is making 10-gauge eet metal, which is supposed to be 3.416 mm ick. One of the pieces of manufacturing equipment as suspected of malfunctioning and resulting in eet metal that is too thin (less than 3.416 mm). So e manufacturer selected a random sample of 100 eces of steel.measured the thickness of each ece, and calculated the mean thickness of the eel pieces in his sample. a. Which of the following is the Null Hypothesis Họ stated in words? Ho: The average steel thickness is different from 3.416 mm. The equipment is not making the sheet metal the correct thickness. Ho: The average steel thickness is less than 3.416 mm. The equipment is making the sheet metal too thin. Ho: The average steel thickness is 3.416 mm (or more). The equipment is working properly and not making the sheet metal too thin. )Ho: The average steel thickness is greater than 3.416 mm. The equipment is making the sheet metal too thick.
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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