1. The owner of automobile towing services company knows that the number of towing service calls the company makes each day is a random variable have approximately normal distribution with the mean 36.2 and standard deviation 5.1. What are the probabilities that in any given day the company will make:
a. Exactly 30 towing service calls
b. At most 30 towing service calls
1. The owner of automobile towing services company knows that the number of towing service calls...
A company services home air conditioners. It is know that times for service calls follow a normal distribution with a mean of 60 minutes and a standard deviation of 10 minutes. d) Find the shortest range of times that includes 50% of all service calls. e) A random sample of four service calls is taken. what is the probability that exactly two of them take more than 65 minutes? Thank you!
A company services home air conditioners. It is known that times for service calls follow a normal distribution with a mean of 60 minutes and a standard deviation of 10 minutes. A random sample of seven service calls is taken. What is the probability that exactly two of them take more than 68.4 minutes? For calculation convenience, you may round probability results to the nearest thousandth (3 decimals).
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...
At a customer service call center for a large company, the number of calls received per hour is normally distributed with a mean of 120 calls and a standard deviation of 5 calls. What is the probability that during a given hour of the day there will be less than 132 calls, to the nearest thousandth?
Since everyone is staying at home, a study was done on how much time Americans are spending on the internet. The study showed that the mean time people are spending on the internet per day is 5.1 hours with a standard deviation of 1.9 hours. A random sample of 65 Americans is taken. Describe the sampling distribution of the sample mean. Group of answer choices shape: approximately normal μx¯=5.1 σx¯= 0.24 shape: exactly normal μx¯=5.1 σx¯= 0.24 shape: approximately normal...
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 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 Speedy Lube complete an oil change service on an automobile approximately follows a normal distribution, with mean of 17 minutes and a standard deviation of 2.5 minutes. Speedy Lube guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service half-price. What percent of customers receive the service for half price? If Speedy Lube does not want to give the discount to more than...
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 distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 adult males is selected. Describe the sampling distribution. a. Since the sample size is greater than 30, the sampling distribution is approximately normal with a sample mean of 69 inches and a sample standard deviation of 9 inches. b. Since the sample size is greater than 30, the sampling distribution is approximately normal with a...