A emergency center ensures that the average response time for the calls received is less than...

A emergency center ensures that the average response time for the calls received is less than 75 seconds. To
corroborate this statement, an external agency collects a sample of 90 calls. For this sample, the average
response time was 70 seconds with a standard deviation of 15 seconds. Does the collected information match the claim of the center? Show your work. If needed use a level of significance = 0:05

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

QUESTION 14 If the price received by a producer is less than average variable cost in...

QUESTION 14 If the price received by a producer is less than average variable cost in the short run, then the firm A. is earning zero economic profits B. is earning positive economic profits C. should continue to produce in the short run D. should shut down immediately 5 points QUESTION 15 The short-run price elasticity of demand for gasoline in the US is roughly equal to -0.25, which tells us that A. the short-run demand for gasoline is...

The previous average response time for emergency vehicles was 5 minutes. A recent sample found the...

The previous average response time for emergency vehicles was 5 minutes. A recent sample found the following response times (minutes): 4.23 5.14 4.85 3.25 1.56 6.22 5.05 4.23 3.89 3.33 2.85 5.56 2.50 A. What is the average response time for the sample? B. What is the standard deviation for all samples of response times of this sample size? C. Assuming α = 2.5%, what is the value of the test statistic for this hypothesis test? D. What is the...

At a call center, calls come in at an average rate of four calls per minute....

At a call center, calls come in at an average rate of four calls per minute. Assume that the time elapsed from one call to the next has the exponential distribution, and that the times between calls are independent. a. Find the average time between two successive calls. b. Find the probability that after a call is received, the next call occurs in less than ten seconds. c. Find the probability that less than five calls occur within a minute....

Scenario For the third time in less than a week, Wanda has received a phone call...

Scenario For the third time in less than a week, Wanda has received a phone call from a customer who is upset that when her order arrived, it was incorrect. Wanda refunded money to all three customers in order to keep them happy. She is not sure what’s causing these errors, but she knows it has to be remedied or she will lose customers. When you meet for coffee, Wanda mentions these problems and wonders aloud what the issue is....

Historically emergency responders respond in less than 5 minutes 74% of the time. A recent sample...

Historically emergency responders respond in less than 5 minutes 74% of the time. A recent sample of n = 715 found 70% of emergency calls had a response time of less than 5 minutes. Perform a hypothesis test with α = 2.5% to see if the response time percentage has significantly decreased. A. What is Ho? B. What is H1? C. What is the value of the test statistic? D. What is the value of the critical value? E. What...

A car dealer claims that the average wait time for an oil change is less than...

A car dealer claims that the average wait time for an oil change is less than 30 minutes. The population of wait times is normally distributed and 26 customers are sampled. The sample mean is 28.7 minutes and the standard deviation of the sample is 2.5 minutes. Test the claim at the .05 significance level (α=.05) using the traditional method.

The makers of a child's swing set claim that the average assembly time is less than...

The makers of a child's swing set claim that the average assembly time is less than 2 hours. A sample of 35 assembly times (in hours) for this swing set is given in the table below. Test their claim at the 0.10 significance level. (a) What type of test is this? This is a right-tailed test. This is a two-tailed test. This is a left-tailed test. (b) What is the test statistic? Round your answer to 2 decimal places. t...

Police response time to an emergency call is the difference between the time the call is...

Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of 8.8 minutes and a standard deviation of 1.9 minutes. For a randomly received emergency call, find the following probabilities. (Round your answers...

Police response time to an emergency call is the difference between the time the call is...

Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of 11.6 minutes and a standard deviation of 2.3 minutes. For a randomly received emergency call, find the following probabilities. (Round your answers...

Police response time to an emergency call is the difference between the time the call is...

Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of 10.0 minutes and a standard deviation of 1.5 minutes. For a randomly received emergency call, find the following probabilities. (Round your answers...

Subjects