Project 3.9: Statistics and quality
description
Today’s consumers are constantly trying to judge the quality of products. But what is quality? How and by whom is quality determined? Some would say the designer creates specifications, which in turn dictate the quality of a product. That quality is also based on the acceptable value of a part within a whole product. Statistics are commonly used in manufacturing processes to control and maintain quality. This activity will allow you to apply statistics in order to analyze and determine the quality (as measured by the consistency of the size) of wooden cubes. The wooden cubes will be used in the Puzzle Cube Challenge in the next Unit. You will design and construct a puzzle cube as part of the challenge. The consistency in size of the wooden cubes will affect the quality of your final product.
In this activity you will collect data and then perform a statistical analysis to estimate measures of central tendency and variation of a product (wooden cubes). You will represent the data using a histogram, establish criteria for an acceptable size of the product, and use the Empirical Rule to eliminate product samples that are outside an acceptable range.
In this activity you will collect data and then perform a statistical analysis to estimate measures of central tendency and variation of a product (wooden cubes). You will represent the data using a histogram, establish criteria for an acceptable size of the product, and use the Empirical Rule to eliminate product samples that are outside an acceptable range.
conclusion
How would the histogram of the entire class’ data change compared to your histogram?
Be relatively similar to mine.
What value would you expect for the mean of the length measurements if the data from the entire class were used? Explain.
.7400 +/- .421; my mean, plus/minus my range and dial caliper inaccuracy
Would you expect the standard deviation of the class’ measurements be larger, smaller, or about the same as the standard deviation of your measurements? Why?
About the same, same instruments used
In which phase(s) of a design process might statistics be most useful? Why?
Testing; so you can build the most efficient product possible
How can statistics of a product’s dimensions be used to assess the quality of the product?
Find how much room it takes up, how sturdy is it to build,... exc.
Be relatively similar to mine.
What value would you expect for the mean of the length measurements if the data from the entire class were used? Explain.
.7400 +/- .421; my mean, plus/minus my range and dial caliper inaccuracy
Would you expect the standard deviation of the class’ measurements be larger, smaller, or about the same as the standard deviation of your measurements? Why?
About the same, same instruments used
In which phase(s) of a design process might statistics be most useful? Why?
Testing; so you can build the most efficient product possible
How can statistics of a product’s dimensions be used to assess the quality of the product?
Find how much room it takes up, how sturdy is it to build,... exc.