Defects in computer hard-drives will usually render the entire computer worthless.For a particular model,the percent defective in the past has been 1%.If a sample size of 400 is taken,what would the 95.5% lower control chart limit be?
A)0.00995
B)0.00005
C)0.00000
D)0.01000
E)0.09550

Question

Quizplus · Accepted Answer

The lower control limit (LCL) for a proportion can be calculated using the formula: LCL = p - Z * sqrt(p(1-p)/n), where p is the proportion defective (0.01), Z is the Z-value for 95.5% confidence (approximately 2), and n is the sample size (400). Calculating this gives approximately 0.00005.

Defects in Computer Hard-Drives Will Usually Render the Entire Computer