You want to determine the upper control line for a p-chart for quality control purposes. You take several samples of a size of 100 items in your production process. From the samples you determine the fraction defective is 0.05 and the standard deviation is 0.02. If the desired confidence level is 99.7 percent, which of the following is the resulting UCL value for the line?

a. 0.39
b. 0.11
c. 0.06
d. 0.05
e. None of these

Option E is correct one.

None of the options are correct. The correct answer is 0.08.

Explanation:

The Upper Control Limit (UCL) for a p-chart is calculated as,

UCL = P-bar + (Z x Sp)

where,

P-bar = Fraction defective = 0.05

Sp = Standard deviation = 0.01

Using standard normal table, for 99.7% confidence level,

Z = 3.00

Putting the given values in the above formula, we get,

UCL = 0.05 + (3.00 x 0.01)

UCL = 0.08

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

answer; niosh, the national institute for occupational safety and health;