The National Association of Realtors estimates that 23 of all homes purchased in 2004 were considered investment properties.
If a sample of 800 homes sold in 2004 is obtained what is the probability that at most 200 homes are going to be used as investment property? A) 0.9099 B) 0.4066 C) 0.0934 D) 0.5935
Q. 2Suppose a brewery has a filling machine that fills 12 ounce bottles of beer. It is known that the amount of beer poured by this filling machine follows a normal distribution with a mean of 12.13 ounces and a standard deviation of 0.04 ounce.
Find the probability that the bottle contains fewer than 12.03 ounces of beer. A) 0.0062 B) 0.4938 C) 0.9938 D) 0.5062
Q. 3Classify the statement as an example of classical probability, empirical probability, or subjective probability. The probability that cab fares will rise during the winter is 0.05.
A) subjective probability B) classical probability C) empirical probability
Q. 4A history professor decides to give a 12-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than 0.10.
What score should be set as the lowest passing grade? A) 9 B) 7 C) 10 D) 8
Q. 5A nationwide survey claimed that at least 55 of parents with young children condone spanking their child as a regular form of punishment.
In a random sample of 100 parents with young children, how many would need to say that they condone spanking as a form of punishment in order to refute the claim at = 0.5? A) You would need 46 or less parents to support spanking to refute the claim.
B) You would need exactly 46 parents to support spanking to refute the claim.
C) You would need 47 or less parents to support spanking to refute the claim.
D) You would need more than 46 parents to support spanking to refute the claim.
Q. 6Classify the statement as an example of classical probability, empirical probability, or subjective probability. The probability that it will snow tomorrow is 53.
A) subjective probability B) classical probability C) empirical probability
Q. 7We believe that 86 of the population of all Calculus I students consider calculus an exciting subject. Suppose we randomly and independently selected 29 students from the population.
If the true percentage is really 86, find the probability of observing 28 or more of the students who consider calculus to be an exciting subject in our sample of 29. A) 0.072098 B) 0.012602 C) 0.059495 D) 0.927902
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