Quiz 2 - Fall 2011 - MGMT 305 - Quiz 2 - Multiple Choices...

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Fall 2011 - MGMT 305 - Quiz 2 - Multiple Choices ( 1 point each ) Name: ID: ____ 1. A sample of size 16 is taken from a normally distributed population with a mean of 12 and a standard  deviation of 3. The probability that the sample mean is equal to 12 is a. 1 b. 0.5 c. -0.5 d. 0 ____ 2. A population is normally distributed with a mean of 20 and a standard deviation of 5.  If a sample of size 25  is selected from this population, what is the probability that the sample mean will be within ±1.25 of the  population mean? a. 0.7888 b. 0.5000 c. 0.3944 d. Since the sample mean is not given, the probability cannot be determined. ____ 3. Regarding t-distribution, which one of the following is  correct ? a. t-distribution is not symmetric. b. When the degrees of freedom get smaller, the t-distribution approaches closer to the normal  distribution. c.
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Quiz 2 - Fall 2011 - MGMT 305 - Quiz 2 - Multiple Choices...

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