A mouse factory produces seven parts for computers’ mouse using an injection-molding machine; the purpose of this report is to maximize the density of the parts made, as well as to described using statistical tools the results obtained with the initial settings of the machines.. In the injection molding department there are a total of six machines that produce parts on a daily basis, some of these machines can produce up to eight or 16 part at a time and others can produce two different parts in the same machine.

The initial settings of the machines are the following:

Mold Temperature Injection Velocity Mold Pressure Back Pressure Cooling Time
135.0 2.95 657.5 85.0 42.65

Graphical Analysis:

The plot of the density shows that the data is not symmetric since the more of the data lies above 2.4 lb./ft2. The first quartile is above 2.3 lb./ft2.and the third quartile is below 2.5 lb./ft2.with a median of 2.4 lb./ft2. …show more content…
Figure 2 Histogram of Density
Using Minitab the data can be graph to check for the distribution, it was obtained that the data with a sample of 35 results is normally distributed since all of its results lies inside the bounds. The graph shows that it has a 95% confidence and a p value of .944.

Figure 3 Probability plot of Density

Descriptive statistics:

Using Minitab it was possible to obtained a descriptive statistics of the sample with 35 results. The results of Minitab shows that using a sample of 35 gives a mean of 2.4 lb./ft2, and a standard deviation of .08393, which it means that it will deviated less than .084 from the mean. The first quartile of the data is at 2.33 and the third quartile is at