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Unformatted text preview: Res 342 Week 2 Quiz Name: 1. Z-Score tells us a) How many standard deviations there are between the selected score and the mean. b) The mean of the sample c) How far in terms of standard deviations a given score is from the mean d) Normal Distribution e) a and c f) b and c 2. What is the value of the shaded area for Z=0 to Z= 1.85? a) 0.4744 b) 0.4678 c) 0.2323 d) 0.4049 3. Suppose the prices of all three-year old Chevy Trucks have a normal distribution with a mean price of $47,125 and a standard deviation of $1500. Find the probability that a randomly selected three-year- old Chevy Truck will sell for a price between $45,000 and $49,000. Use the formula below to find Z. Z= 47,125-49,000 =1.25 Z= 47,125-45,000 = -1.416 1500 1500 .3944+ .0764.=4708=47.08% Shaded area - = x z 4. What is test of Hypothesis? a) A procedure to verifying the assumption that a sample equivalence is not statistically different from the population parameter b) Is a statistical procedure that involves formulating a hypothesis and using sample data to decide...
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- Spring '11
- Personal Finance