A restauraunt manager has determined that 25% of its customers order coffee with their desert. You...
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A restauraunt manager has determined that 25% of its customers
order coffee with their desert. You...
Assume the population standard deviation is σ = 25. Compute the standard error of the mean...
Assume the population standard deviation is σ = 25. Compute the standard error of the mean for a sample size of 50. (Round to two decimal places) Answer Compute the standard error of the mean for a sample size of 100. (Round to two decimal places) Answer Compute the standard error of the mean for a sample size of 150. (Round to two decimal places) Answer Compute the standard error of the mean for a sample size of 200. (Round...
Mooncents Coffee Shop has just opened, and on the first 6 days of business, the number...
Mooncents Coffee Shop has just opened, and on the first 6 days of business, the number of customers who have come into the store during a particular time period are as reported in the following table. Day # Customers 1 25 2 22 3 23 4 28 5 29 6 26 a. Calculate the average number of customers visiting and the sample standard deviation of customer visits for Mooncents Coffee. (Round intermediate...
At a certain coffee shop, all the customers buy a cup of coffee and some also...
At a certain coffee shop, all the customers buy a cup of coffee and some also buy a doughnut. The shop owner believes that the number of cups he sells each day is normally distributed with a mean of 320 cups and a standard deviation of 24 cups. He also believes that the number of doughnuts he sells each day is independent of the coffee sales and is normally distributed with a mean of 150 doughnuts and a standard deviation...
A cafeteria serving line has a coffee urn from which customers serve themselves. Arrivals at the...
A cafeteria serving line has a coffee urn from which customers serve themselves. Arrivals at the urn follow a Poisson distribution at the rate of 4.0 per minute. In serving themselves, customers take about 12 seconds, exponentially distributed. a. How many customers would you expect to see on the average at the coffee urn? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Average no of customers b. How long would you expect it to take...
Problem 10-10 A cafeteria serving line has a coffee urn from which customers serve themselves. Arrivals...
Problem 10-10 A cafeteria serving line has a coffee urn from which customers serve themselves. Arrivals at the urn follow a Poisson distribution at the rate of 4.0 per minute. In serving themselves, customers take about 8 seconds, exponentially distributed. a. How many customers would you expect to see on the average at the coffee urn? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Average no of customers ____ b. How long would you expect it...
1. A bank has kept records of the checking balances of its 4000 customers and determined...
1. A bank has kept records of the checking balances of its 4000 customers and determined that the average daily balance of its customers is $300 with a standard deviation of $48. A random sample of 144 checking accounts is selected. Please answer the following questions. (a) What is the probability that the sample mean will be more than $309? (b) What is the probability that the sample mean will be between $293 and $307? (c) Suppose the number of...
A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 6.9...
A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 6.9 ounces of coffee per cup. If it dispenses more than that on average, the corporation may lose money, and if it dispenses less, the customers may complain. Believing that the mean amount of coffee μ dispensed by the machine is less than 6.9 ounces, BIG plans to do a statistical test of the claim that the machine is working as designed. BIG gathers a...
The manager of a grocery store has taken a random sample of 100 customers. The average...
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known at 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes. Use α = 0.05. 14. The test statistic is a. 1.96 b. 1.64 c. 2.00 d. 0.056...
The mean preparation fee H&R Block charged retail customers last year was $183. Use this price...
The mean preparation fee H&R Block charged retail customers last year was $183. Use this price as the population mean and assume the population standard deviation of preparation fees is $50. What is the probability that the mean price for a sample of 30 H&R Block retail customers is within $8 of the population mean? (Round to four decimal places) Answer What is the probability that the mean price for a sample of 50 H&R Block retail customers is within...
Based on historical data, your manager believes that 27% of the company's orders come from first-time customers. A...
Based on historical data, your manager believes that 27% of the company's orders come from first-time customers. A random sample of 150 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is less than 0.33? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer= (Enter your answer as a number accurate to 4 decimal places.)
Based on historical data, your manager believes that 27% of the company's orders come from first-time customers. A random sample of 150 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is less than 0.33? Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations. Answer= (Enter your answer as a number accurate to 4 decimal places.)
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