If x, the time (in minutes) to complete an oil change job at certain auto service...
If x, the time (in minutes) to complete an oil change job at certain auto service station, is uniformly distributed over the interval 20 to 30, inclusively (20 ≤ x ≤ 30), then the standard deviation of this distribution is
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If x, the time (in minutes) to complete an oil change job at
certain auto service...
The time required for an oil change at a certain service station follows a distribution with...
The time required for an oil change at a certain service station follows a distribution with mean 11.4 minutes and standard deviation 3.2 minutes. A random sample of 40 oil changes is selected. (a) Explain why the sampling distribution of ¯ x, the mean time of 40 oil changes, is approximately normally. (b) Find the mean and the standard deviation of the sampling distribution of ¯ x. Round your answers to one decimal place. (c) What is the probability that...
b).77 c).80 d) .85 e).87 20. Epsilon Manufacturing Company makes a specialized electronic product used in...
b).77 c).80 d) .85 e).87 20. Epsilon Manufacturing Company makes a specialized electronic product used in the automotive industry. This product has 4 components, each of which could be defective. So the total number of defects of this product can be 0, 1,2,3, or 4. The following table provides the probabilities of the number of defects: Number of defects Probability 508 302 105 080 005 The standard deviation of the number of defects is a).89 b).90 c) .91 d).92 e).93...
The amount of time a service technician needs to change the oil in a car is...
The amount of time a service technician needs to change the oil in a car is uniformly distributed between 10 and 23 minutes. Let X = the time needed to change the oil on a car. Write the distribution. Find P (x > 20). Find the 65th percentile.
Question 1 1 pts The time it takes a service station to change the oil in...
Question 1 1 pts The time it takes a service station to change the oil in a car is normally distributed with a mean of 20 minutes and a standard deviation of 5 minutes. What percentage of cars take longer than 30 minutes? Approximately 0% Approximately 2%. Approximately 14%. Approximately 100% Question 2 1 pts
The time taken by an auto mechanic to complete an oil change is random with mean...
The time taken by an auto mechanic to complete an oil change is random with mean 30.5 minutes and standard deviation of 2 minutes. a) What is the probability that 40 oil changes take more than 1250 minutes? b) What is the probability that a mechanic can complete 60 or more changes in less than 1850 minutes?
The time required for an automotive center to complete an oil change service on an automobile...
The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 17 minutes and a standard deviation of 2.5 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center does not want...
The time required for an automotive center to complete an oil change service on an automobile...
The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 19 minutes and a standard deviation of 2 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center does not want...
The time required for an automotive center to complete an oil change service on an automobile...
The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 19 minutes and a standard deviation of 2 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center does not want to...
The time required for an automotive center to complete the service oil change service on an automobile approximately follows a normal distribution
1.The time required for an automotive center to complete the service oil change service on an automobile approximately follows a normal distribution, with a mean 19 minutes and a standard deviation of 3 minutes. a. The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take ionger, the customer will receive the service for half-price. What percent of customers recelve the service for half-price? b. If the automotive center does not want to give the...
4. [20 Points) The time required for an automotive center to complete an oil change service...
4. [20 Points) The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 17 minutes and a standard deviation of 2 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center...
b).77 c).80 d) .85 e).87 20. Epsilon Manufacturing Company makes a specialized electronic product used in the automotive industry. This product has 4 components, each of which could be defective. So the total number of defects of this product can be 0, 1,2,3, or 4. The following table provides the probabilities of the number of defects: Number of defects Probability 508 302 105 080 005 The standard deviation of the number of defects is a).89 b).90 c) .91 d).92 e).93...
Question 1 1 pts The time it takes a service station to change the oil in a car is normally distributed with a mean of 20 minutes and a standard deviation of 5 minutes. What percentage of cars take longer than 30 minutes? Approximately 0% Approximately 2%. Approximately 14%. Approximately 100% Question 2 1 pts
The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 17 minutes and a standard deviation of 2.5 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center does not want...
4. [20 Points) The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 17 minutes and a standard deviation of 2 minutes. (a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customers receive the service for half-price? (b) If the automotive center...
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