A company that produces face masks at 10 different factories has noticed daily mean of 4 million with a standard deviation of 665,000 across all factories. Given the increase in demand a seven week (49 days) study was conducted.

What is the standard error of the study? Answer

What is the probability, as decimal, of having a sample mean greater than 4.16 million?

Z Value of 4.16 million: Answer

Probability of greater than 4.16 million: Answer

What is the probability, as decimal, of having a sample mean between 3.86 million and 4.12 million?

Z Value of 3.86 million: Answer

Z Value of 4.12 million: Answer

Probability of having a sample mean between 3.86 million and 4.12 million: Answer

What is the probability, as decimal, if the 7-week study revealed a total production below 187.18 million?

Daily Mean of the 7 week sample: Answer million

Z Value of above value: Answer

Probabilityof the above scenario: Answer