week7 stats quiz differen 2

# week7 stats quiz differen 2 - (TCO 6 In the standard normal...

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(TCO 6) In the standard normal distribution, the standard deviation is always 0 1 2 none of these 2. (TCO 6) The area under a normal curve with mu = 8 and sigma = 3 is 0 1 2 none of these 3. (TCO 6) If Mary gets a 90 on a physics test where the mean is 85 and the standard deviation is 4.59, where does she stand in relation to her classmates? She is in the top 15%. She is in the bottom 15%. She is in the top 5%. She is in the bottom 5%. 4. (TCO 6) In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = -3? 16 18 20 none of these 5. (TCO 6) Let’s assume you have taken 100 samples of size 64 each from a normally distributed population. Calculate the standard deviation of the sample means if the population’s variance is 49. 0.875 0.125 0.766 0.587 6. (TCO 6) The area to the left of ‘z’ is 0.0681. What z-score corresponds to this area? -1.40 1.49 -1.49 none of these 7. (TCO 6) Find P(9 < x < 22) when mu = 20 and sigma = 5. (Points: 5)

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0.6554 0.6415 0.0139
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week7 stats quiz differen 2 - (TCO 6 In the standard normal...

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