In: Statistics and Probability
Use only the information in the following table for the next few questions. The following statistics represent samples of copper wire submitted by two companies for tensile strength testing (psi).
Statistic Company A Company B
Arithmetic Mean 500 600
Median 500 500
Mode 500 300
Standard Deviation 40 20
Mean Absolute Deviation 32 16
Quartile Deviation 25 14
Range 240 120
Sample Size 100 80
The middle 95% of the wires from Company A tested between _____ and _____ . Record ONLY the lower limit as a whole number.
The middle 50 percent of the wires of Company A tested between _____ and _____. Record ONLY the lower limit as a whole number.
Which company's distribution has the larger dispersion (answer either 'A' or 'B')?
The variance for Company A is _____?