The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the Excel output from a study to see whether there is evidence of a difference in the mean amounts of time required to reach a customer service representative between two hotels. Assume that the population variances in the amount of time for the two hotels are not equal.
t-Test: Two-sample assuming Unequal Variances
|
Hotel 1 |
Hotel 2 |
|
|
Mean |
2.95 |
2.01 |
|
Variance |
2.952 |
3.579 |
|
Observations |
20 |
20 |
|
df |
38 |
|
|
t Stat |
? |
|
|
t Critical one-tail |
1.686 |
|
|
t Critical two-tail |
2.024 |
|
What is the value of the test statistic?

The amount of time required to reach a customer service representative has a huge impact on...
The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. A study was conducted to see whether there is evidence of a difference in the mean amounts of time required to reach a customer service representative between two hotels. Two samples of data were collected (see below). Assume that the population variances in the amount of time for the two hotels are not equal. Hotel 1 Hotel 2 Mean 2.214 2.0115 Variance...
Referring to Scenario 10-14, what is the value of the test statistic SCENARIO 10-14 The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. Below is the Excel output from a study to see whether there is evidence of difference in the mean amounts of time required to reach a customer service representative betwed two hotels. Assume that the population variances in the amount of time for the two hotels are not...
A customer service representative must spend different amounts of time with each customer to resolve various concerns. The amount of time spent with each customer can be modeled by the following distribution: X ~ Exp(0.4). What is the mean? (Enter an exact number as an integer, fraction, or decimal.)
nationwide, the average waiting time until a electric utility customer service representative answers a call is 360 seconds. The gigantic kilowatt energy company randomly sampled 40 calls and found that, on average, they were answered in 331 seconds with a population standard deviation of 30 seconds. can the company claim that they are faster than the average utility at a=0.05? a. no because the test value -0.97 falls in the critical region b. no because the test value is -0.15...
1. A customer service representative must spend different amounts of time with each customer to resolve various concerns. The amount of time spent with each customer can be modeled by the following distribution: X ~ Exp(0.2) Find P(x > 4) a. 0.225 b. 0.449 c. 0.551 d. 0.635 2. At an urgent care facility, patients arrive at an average rate of one patient every seven minutes. Assume that the duration between arrivals is exponentially distributed. Find the probability that the...
10. The owner of a company has asked you to conduct an evaluation of the customer satisfaction ratings to see if the company continues to provide customers with customer service that ranks above average. To be considered above average the average customer satisfaction score has to be above 7. Suppose a random sample of 60 customers is taken from a population to evaluate customer satisfaction. The sample mean is 7.25. The sample standard deviation is 1.05. The population mean is...
The customer service center in a department store has determined that the amount of time spent with a customer about a complaint is normally distributed with a mean of 9.3 minutes and a standard deviation of 2.5 minutes. a. What is the z-value that corresponds to x =10 minutes. b. What is the z-value that corresponds to x =5 minutes c. what is the x-value that corresponds to z = 1.12? Round answer to the nearest whole number.
A magazine claims that the mean amount spent by a customer at Burger Stop is greater than the mean amount spent by a customer at Fry World. The results for samples of customer transactions for the two fast food restaurants are shown below. At alphaαequals=0.05 can you support the magazine's claim? Assume the population variances are equal. Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e) below. Burger Stop Fry World...
A customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been completed. The company then matches each customer's rating with the number of minutes the person waited on hold. The following table shows the ratings and the number of minutes on hold for 10 randomly selected customers. Complete parts a and b. EEB Click the icon to view the data table 囲Click the icon to view the critical...
having trouble working excel, please help
Lab Assignment Each student has been assigned a unique data set, and will be required to perform basic statistical analyses on the data. Each exercise should be saved to a new file so one of your first tasks will be to make sufficient copies of your data file, named appropriately. E.g. Grant, Karen Inf Stats Ex1; Grant, Karen Inf Stats Ex2; Grant, Karen Inf Stats Ex3. All data files are taken from real data...