Which of the following describes what the property of unbiasedness means?
A) The center of the sampling distribution is found at the population standard deviation.
B) The sampling distribution in question has the smallest variation of all possible sampling distributions.
C) The center of the sampling distribution is found at the population parameter that is being estimated.
D) The shape of the sampling distribution is approximately normally distributed.
Question 2
Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of 500 per month and a standard deviation of 50 per month. Refer to such expenses as PCE's (personal call expenses). Find the probability that a randomly selected month had PCE's below 350.
A) 0.9987 B) 0.0013 C) 0.7000 D) 0.3000
Adam Kahn, Brockholes Visitor Center.
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