Question

In: Statistics and Probability

A local hospital claims that you will not wait longer than 45 minutes in the emergency...

A local hospital claims that you will not wait longer than 45 minutes in the emergency room. You go out to test this claim and find a sample of 81 patients chosen at random from their emergency room, you find a sample mean of 52 minutes with a sample standard deviation of 23 minutes. Can you publicly debunk their claim (call their claim fraudulent) at the 1% significance level? Use a test stat and then a p-value to determine if your conclusion is weak or strong.

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

A local hospital claims that you will not wait longer than 45 minutes in the emergency...
A local hospital claims that you will not wait longer than 45 minutes in the emergency room. You go out to test this claim and find a sample of 81 patients chosen at random from their emergency room, you find a sample mean of 52 minutes with a sample standard deviation of 23 minutes. Can you publicly debunk their claim (call their claim fraudulent) at the 1% significance level? Use a test stat and then a p-value to determine if...
A local retailer claims that the mean waiting time is less than 8 minutes. A random...
A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.8 minutes with a standard deviation of 2.1 minutes. At a = 0.01, test the retailer's claim. Assume the distribution is normally distributed. Round the test statistic to the nearest thousandth.
A local retailer claims that the mean waiting time is less than 8 minutes. A random...
A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.3 minutes with a standard deviation of 2.1 minutes. At α = 0.01, test the retailerʹs claim. Assume the distribution is normally distributed. Use any method, however, follow the PHANTOMS acronym. P - Parameter Statement H - Hypotheses A - Assumptions & Conditions N - Name the Test and state the curve you're using T...
Will students wait longer for the arrival of an instructor who is a full professor than...
Will students wait longer for the arrival of an instructor who is a full professor than for one who is a graduate student? This question was investigated by counting how many minutes undergraduate students waited in two small seminar classes, one taught by a full professor and one taught by a graduate student. The data (in minutes) are as follows: Graduate Student Instructor: 9, 11, 14, 14, 16, 19, 37 Full Professor: 13, 15, 15, 16, 18, 23, 28, 31,...
Will students wait longer for the arrival of an instructor who is a full professor than...
Will students wait longer for the arrival of an instructor who is a full professor than for one who is a graduate student? This question was investigated by counting how many minutes undergraduate students waited in two small seminar classes, one taught by a full professor and one taught by a graduate student. The data (in minutes) are as follows: Graduate student instructor: 9, 11, 14, 14, 16, 19, 37 Full professor: 13, 15, 15, 16, 18, 23, 38, 31,...
A drugstore considers a wait of more than 5 minutes to be a defect. Each week...
A drugstore considers a wait of more than 5 minutes to be a defect. Each week 100 customers are randomly selected and timed at the checkout line. The numbers of defects for 20 consecutive weeks are given below. 4 4 5 5 5 5 5 6 6 6 6 12 6 6 6 7 6 7 8 7 Find the correct lower control limit
A study of the total number of minutes spent in the local emergency room revealed that...
A study of the total number of minutes spent in the local emergency room revealed that patients spent on average 162.8 minutes in the ER, with a standard deviation of 53.4 minutes. Assume that the times follow a normal distribution. Let X be the processing time of a randomly selected patient. (a) Describe the probability distribution of X and state its parameters μ and σ. (b) Find the probability that the processing time of a randomly selected patient is i....
A local business promotes oil changes that last on the average of 45 minutes with a...
A local business promotes oil changes that last on the average of 45 minutes with a standard deviation of 10 minutes.  If the process of changing oil follows a normal distribution, answer the following: What is the probability an oil change takes less than 40 minutes? What is the probability that the oil change takes between 35 and 55 minutes? What is the probability that an oil change takes less than 49 minutes. What is the probability that an oil change...
A biologist claims that a specific type of hamsters live for longer than, or equal to,...
A biologist claims that a specific type of hamsters live for longer than, or equal to, 5 years on average. From 2000 hamsters that she has in her lab, she selects a random sample of 50 hamsters for testing and recorded that they lived for 4.9 years on average. Based published papers in the field, she knows that the standard deviation of the lifespan of this type of hamsters is 1/3 years. Help the biologist to conduct a hypothesis test...
If a sandwich delivery takes longer than 30 minutes, the sandwich is free. If the average...
If a sandwich delivery takes longer than 30 minutes, the sandwich is free. If the average time for delivery is 18 minutes with a standard deviation of 4 minutes and delivery time is normally distributed: What percent of sandwich will be free? Delivery drivers who complete deliveries in fewer than 10 minutes get a bonus. What percent of deliveries grant bonuses to drivers? Delivery drivers who are “buzzer beaters” – meaning they deliver the sandwich with less than two minutes...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT