5. A car dealership selects 40 subjects at random who indicate a 0.9 probability
ID: 3058115 • Letter: 5
Question
5. A car dealership selects 40 subjects at random who indicate a 0.9 probability of selecting Car A over Car 8. The manager recognizes this may be binomial data and asks you to determine if it can be used to approximate a normal distribution so she can make cost predictions. Can this data be used to approximate the normal distribution? State why or why not. 6. 0.2157 is the area between the mean and the Z value. Find the Z value. 02157 For a normal distribution with a mean of 15 and a standard deviation of 7, which range of the X values defines an area under the curve corresponding to a probability of approximately the center 68%. a. From 11.5 to 18.5 b. From 15 to 29 c. From 8 to 22 d. From 1 to 29 7. 8. Which of the following is not a characteristic of the normal curve? a. It is bell shaped b. It is unimodal c. The mean, median and mode are the same d. It intersects with the x axis after approximately 14 times the standard deviation e. It is continuous 9. The standard deviation of the sample means is calledExplanation / Answer
5. A car dealership selects 40 subjects at random who indicate a 0.9 probability of selecting Car A over Car 8. The manager recognizes this may be binomial data and asks you to determine if it can be used to approximate a normal distribution so she can make cost predictions. Can this data be used to approximate the normal distribution? State why or why not. 6. 0.2157 is the area between the mean and the Z value. Find the Z value. 02157 For a normal distribution with a mean of 15 and a standard deviation of 7, which range of the X values defines an area under the curve corresponding to a probability of approximately the center 68%. a. From 11.5 to 18.5 b. From 15 to 29 c. From 8 to 22 d. From 1 to 29 7. 8. Which of the following is not a characteristic of the normal curve? a. It is bell shaped b. It is unimodal c. The mean, median and mode are the same d. It intersects with the x axis after approximately 14 times the standard deviation e. It is continuous 9. The standard deviation of the sample means is called
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