Question

1. You are a manager responsible for a quality of the product. According to the design spec of the product, the weights of units should be distributed with mean 50 pounds and standard deviation 20 pounds. This distribution is not a Normal distribution. Now, suppose you pick 16 units randomly and check the average weight of these 16 units. You repeat this process many times and obtain a distribution. What is the distribution of the average weights? A Not a Normal distribution B Normal distribution with mean 50 and standard deviation 10 C Normal distribution with mean 50 and standard deviation 16 D Normal distribution with mean 50 and standard deviation 5 E Normal distribution with mean 50 and standard deviation 4 2. You are a manager at a large shopping mall. You found that the average arrivals of customers is 20 per minute. On average, customers stay 80 minutes in the mall. What is the distribution of the number of customers in the shopping mall? A Not a Normal distribution B Normal distribution with mean 600 customers and standard deviation 20 customers C Normal distribution with mean 900 customers and standard deviation 30 customers D Normal distribution with mean 1600 customers and standard deviation 40 customers E None of above is correct

          1. You are a manager responsible for a quality of the product.
According to the design spec of the product, the weights of units
should be distributed with mean 50 pounds and standard deviation 20
pounds. This distribution is not a Normal distribution. Now,
suppose you pick 16 units randomly and check the average weight of
these 16 units. You repeat this process many times and obtain a
distribution. What is the distribution of the average weights?
A
Not a Normal distribution
B
Normal distribution with mean 50 and standard deviation 10
C
Normal distribution with mean 50 and standard deviation 16
D
Normal distribution with mean 50 and standard deviation 5
E
Normal distribution with mean 50 and standard deviation 4
2. You are a manager at a large shopping mall. You found
that the average arrivals of customers is 20 per minute. On
average, customers stay 80 minutes in the mall. What is the
distribution of the number of customers in the shopping mall?
A
Not a Normal distribution
B
Normal distribution with mean 600 customers and standard
deviation 20 customers
C
Normal distribution with mean 900 customers and standard
deviation 30 customers
D
Normal distribution with mean 1600 customers and standard
deviation 40 customers
E
None of above is correct

Added by Jessica M.

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