The waiting time at the doctor’s office has a normal distribution with a mean of 40 minutes and standard deviation 2.8. Give answers to parts (a), (b), and (c) based on this information.
Answer: (2 points) One Value of Z = _________________
Answer: (2 points) Other value of Z = _________________
Answer: (4 points) Probability (Answer to question (b)) = _____________________
The waiting time at the doctor’s office has a normal distribution with a mean of 40...
Question 5 The waiting time in the emergency department in a large hospital is a concern for the outdoor patients. Based on the historical records of the hospital, it is found that the mean and standard deviation of waiting time of patients in the emergency department are 40 minutes and 6 minutes respectively. Assume that the distribution of waiting time follows a normal model. For the waiting time of a random sample of 25 patients from the population of patients...
The waiting time for patients at local walk-in health clinic follows a normal distribution with a mean of 15 minutes and a population standard deviation of 5 minutes. The quality-assurance department found in a sample of 64 patients that the mean waiting time was 13.5 minutes. Using the 99% confidence level and the 95% confidence interval, is it reasonable to conclude the sample mean waiting time is statistically significantly different from the population mean waiting time? i. Firstly, what are...
Assume the commute time is a random variable that follows the normal distribution with a mean of 10.3 minutes with a standard deviation of 4.8 minutes. You wish to calculate the probability that the commute time is more than 16.3 minutes. What is the z value you would look up in the standard normal table to answer this question? What is the probability that the commute time is more than 16.3 minutes? What would be the targeted average commute time...
Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1) complete parts (a) through (d) below. Click here to view page 1 of the cumulative standardized normal distribution table, Click here to view page 2 of the cumulative standardized normal distribution table. a. What is the probability that Z is between 1.57 and 1.83? - The probability that Z is between 1.57 and 1.83 is (Round to four decimal places as needed.) particular train...
. A population with a normal distribution has a mean of 115 and standard deviation 13. A sample of 36 is taken from that population. (a)What is the probability that the sample mean will have a value between 110 and 114? Answer: (6 points) ______________ (b)What is the probability of the sample mean being at least 111.5? Answer: (6 points) _________________ (c)What is the probability of the sample mean having a value of not more than 117? Answer:...
The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6 minutes and the standard deviation of the waiting time is 2 minutes. Find the probability that a person will wait for more than 8 minutes. Round your answer the four decimal places.
The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6 minutes and the standard deviation of the waiting time is 2 minutes. Find the probability that a person will wait for more than 9 minutes. Round your answer to four decimal places.
Given a normal distribution, X, with mean, 135, and standard deviation, sigma = 40. Fill the blank space. A. What is the X value with Z-score equal to z = -2.39? __________ B. What is the probability of X is less than or equal to 45.3? _________ %
The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5 minutes and the standard deviation of the waiting time is 2 minutes. Find the probability that a person will wait for more than 1 minute. Round your answer to four decimal places.
A sample of 50 customers from a large normal population has a mean waiting time of 23 minutes. We know from past testing that the population standard deviation is 4 minutes. Determine a 95% confidence interval for the true mean(waiting time) of the population. Group of answer choices (34.5051, 65.4949) (21.8913, 24.1087) (23.4505, 26.5495) (44.5051, 75.4949)