Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at the stores deli counter. A random sample of 45 customers was timed at the deli counter, and the average service time was found to be 5.75 minutes. Historically the standard deviation for waiting time is 1.75 minutes per customer.

a. Find the 95% confidence interval for the mean time that customers wait at the deli counter.

b. Is there sufficient evidence to indicate that the mean time that a customer spends waiting at the deli counter is 5 minutes? Use α = .02 significance level .

Expert Solution

orchestra answered 2 years ago

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at the stores deli counter. A random sample of 45 customers was timed at the deli counter, and the average service time was found to be 5.75 minutes. Historically the standard deviation for waiting time is 1.75 minutes per customer. a. Find the 95% confidence interval for the mean time that customers wait at the deli counter. b. Is there sufficient evidence to...

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at the stores deli counter. A random sample of 45 customers was timed at the deli counter, and the average service time was found to be 5.75 minutes. Historically the standard deviation for waiting time is 1.75 minutes per customer. a. Find the 95% confidence interval for the mean time that customers wait at the deli counter. b. Is there sufficient evidence to indicate that...

LITTLE’S LAW: Diant grocery stores wish to estimate time customers spend, on average, in store and...

LITTLE’S LAW: Diant grocery stores wish to estimate time customers spend, on average, in store and in a checkout line. The results of the data collected are as below: Avg. rate of customers entering store = 300 cust/hr Avg. # of customers in store = 150 cust % of customers who do not make a purchase = 5% Avg. # customers in checkout lanes = 28.5 cust a) How much time does the average customer spend in the store? b)...

A grocery store is interested in how much money, on average, their customers spend each visit in the produce department.

A grocery store is interested in how much money, on average, their customers spend each visit in the produce department. Using their store records, they draw a sample of 1,000 visits and calculate each customer’s average spending on produce. Who is the population of interest?

Customers enter the camera department of a store with an average of 14 minutes between customers....

Customers enter the camera department of a store with an average of 14 minutes between customers. The department is staffed by one employee, who can handle an average of 13 customers per hour. Assume this is a simple Poisson arrival, exponentially distributed service time situation. Find the following information to help the manager decide if a second employee should be added: The average number of customers waiting. Please keep 4 decimals. The average time a customer waits (in minutes). Please...

Customers enter the camera department of a store with an average of 14 minutes between customers....

Customers enter the camera department of a store with an average of 14 minutes between customers. The department is staffed by one employee, who can handle an average of 13 customers per hour. Assume this is a simple Poisson arrival, exponentially distributed service time situation. Find the following information to help the manager decide if a second employee should be added: The average number of customers waiting. Please keep 4 decimals. The average time a customer waits (in minutes). Please...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the coefficient of variation for each of the two sets of data, then compare the variation. Bank A (single line): 6.5 6.6 6.7 6.9 7.1 7.3 7.4 7.6 7.7 7.8 Bank B (individual lines): 4.4 5.4 5.7 6.2 6.7 7.7 7.8 8.4 9.4 9.9 The...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the coefficient of variation for each of the two sets of data, then compare the variation. Bank A (single line): 6.6 nbsp 6.6 nbsp 6.7 nbsp 6.8 nbsp 7.0 nbsp 7.3 nbsp 7.5 nbsp 7.7 nbsp 7.7 nbsp 7.8 Bank B (individual lines): 4.4 nbsp...

Waiting times (in minutes) of customers in a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the mean and median for each of the two samples, then compare the two sets of results. Single Line 6.5 6.6 6.7 6.8 7.0 7.1 7.5 7.6 7.6 7.6 Individual Lines 4.2 5.4 5.8 6.2 6.5 7.6 7.6 8.6 9.2 9.9 The mean waiting time...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the coefficient of variation for each of the two sets of data, then compare the variation. Bank A (single line): 6.5 6.6 6.7 6.8 7.1 7.4 7.4 7.6 7.7 7.8 Bank B (individual lines): 4.2 5.4 5.8 6.2 6.7 7.7 7.8 8.6 9.3 9.9 The coefficient...

Question

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

Solutions

Expert Solution

Related Solutions

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at...

LITTLE’S LAW: Diant grocery stores wish to estimate time customers spend, on average, in store and...

A grocery store is interested in how much money, on average, their customers spend each visit in the produce department.

Customers enter the camera department of a store with an average of 14 minutes between customers....

Customers enter the camera department of a store with an average of 14 minutes between customers....

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers in a bank where all customers enter a single waiting...

Waiting times (in minutes) of customers at a bank where all customers enter a single waiting...