BANA 2081 Module 8 Study Questions with Correct Answers (1)

BANA 2081 Module 8 Study Questions with Correct Answers (1) A normal distribution with a mean of 0 and a standard deviation of 1 is called - Answer- A standard normal distribution The z score for the standard normal distribution - Answer-Can be either negative or positive In a standard normal distribution, what is the probability that z is greater than zero? - Answer-0.5 A negative value of z indicates - Answer-The number of standard deviations an observation is to the left of the mean The life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 1 year. What is the probability that a terminal will last 5 years or less? Use Excel and round your answer to three decimals. - Answer-0.841 The weight of football players for a team is normally distributed with a mean of 275 pounds and a standard deviation of 50 pounds. The probability of a player weighing more than 350 pounds is - Answer-0.067 Males in the Netherlands are the tallest, on average, in the world with an average height of 183 centimeters (cm).† Assume that the height of men in the Netherlands is normally distributed with a mean of 183 cm and standard deviation of 10.5 cm. (a) What is the probability that a Dutch male is shorter than 176 cm? - Answer-0.2514 Males in the Netherlands are the tallest, on average, in the world with an average height of 183 centimeters (cm).† Assume that the height of men in the Netherlands is normally distributed with a mean of 183 cm and standard deviation of 10.5 cm. (b) What is the probability that a Dutch male is taller than 196 cm? - Answer-0.1075 Males in the Netherlands are the tallest, on average, in the world with an average height of 183 centimeters (cm).† Assume that the height of men in the Netherlands is normally distributed with a mean of 183 cm and standard deviation of 10.5 cm. (c) What is the probability that a Dutch male is between 175 and 191 cm? - Answer- 0.5528 Males in the Netherlands are the tallest, on average, in the world with an average height of 183 centimeters (cm).† Assume that the height of men in the Netherlands is normally distributed with a mean of 183 cm and standard deviation of 10.5 cm. (d) Out of a random sample of 1,000 Dutch men, how many would we expect to be taller than 189 cm? - Answer-284 men A continuous probability distribution that is useful in describing the time, or space, between occurrences of an event is a(n) probability distribution. - Answer- Exponential The probability distribution that can be described by just one parameter is the - Answer- Exponential There is a lower limit but no upper limit for a random variable that follows the probability distribution. - Answer-Exponential The time required to load a truck is exponentially distributed with a mean of 15 minutes. What is the probability that a truck will be loaded in 10 minutes or less? Enter your answer as a decimal not as a percent and round your answer to 3 decimal places. - Answer-0.487 The time required to load a truck is exponentially distributed with a mean of 15 minutes. What is the probability that a truck will be loaded in 20 minutes or more? Enter your answer as a decimal not as a percent and round your answer to 3 decimal places. - Answer-0.264