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Lisa Mendes and Brad Lee work in the sales department of an AT&T Wireless store. Lisa...
Since neither Lisa or Brad have a very high chance of winning, what would you set as a quota of n...
Since neither Lisa or Brad have a very high chance of
winning, what would you set as a quota of new customers if you
wanted each of them to have at least a 25% chance of winning? Be
sure to explain how you calculated your quota.
Lisa Mendes and Brad Lee work in the sales department of an AT&T Wireless store. Lisa has been signing up an average of 48 new cell phone customers every month with a standard deviation...
Customers make purchases at a convenience store, on average, every sixteen minutes. It is fair to...
Customers make purchases at a convenience store, on average, every sixteen minutes. It is fair to assume that the time between customer purchases is exponentially distributed. Jack operates the cash register at this store. a-1. What is the rate parameter λ? (Round your answer to 4 decimal places.) Rate parameter λ ______________ a-2. What is the standard deviation of this distribution? Standard deviation _____________________ b. Jack wants to take a 12-minute break. He believes that if he goes right after...
Customers make purchases at a convenience store, on average, every nine minutes. It is fair to...
Customers make purchases at a convenience store, on average, every nine minutes. It is fair to assume that the time between customer purchases is exponentially distributed. Jack operates the cash register at this store. a-1. What is the rate parameter λ? (Round your answer to 4 decimal places.) a-2. What is the standard deviation of this distribution? (Round your answer to 1 decimal place.) b. Jack wants to take a seven-minute break. He believes that if he goes right after...
A laptop company claims up to 8.0 hours of wireless web usage for its newest laptop...
A laptop company claims up to 8.0 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 7.5 hours and standard deviation 39 minutes. (a) What is the probability that the battery life is at least 8.0 hours? Round your answer to four decimal places (e.g. 98.7654) 89 (b) What...
Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey (CE) show that annual expenditures for...
Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey (CE) show that annual expenditures for cellular phone services per consumer unit increased from $237 in 2001 to $634 in 2007. Let the standard deviation of annual cellular expenditure be $52 in 2001 and $207 in 2007. a. What is the probability that the average annual expenditure of 125 cellular customers in 2001 exceeded $220? (Round final answer to 4 decimal places.) Probability b. What is the probability that...
In a certain store, there is a .02 probability that the scanned price in the bar...
In a certain store, there is a .02 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 844 items. (a-1) What is the expected number of mismatches? (Round your answer to the nearest whole number.) Expected number (a-2) What is the standard deviation? (Use your rounded number for the expected number of mismatches for the calculation of standard deviation. Round your final answer to 4 decimal places.)...
In a certain store, there is a 0.05 probability that the scanned price in the bar...
In a certain store, there is a 0.05 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 850 items. (a-1) What is the expected number of mismatches? (Round your answer to the nearest whole number.) Expected number (a-2) What is the standard deviation? (Use your rounded number for the expected number of mismatches for the calculation of standard deviation. Round your final answer to 4 decimal places.) Standard deviation...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a standard deviation of $500. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions (a) What is the likelihood the sample mean is at least $25.00 decimal places and final answer to 4 decimal places.) Round z value to 2 Probability What is the likelihood the sample mean is greater than $2250 but less...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions. (a)What is the likelihood the sample mean is at least $25.00? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability (b)What is the likelihood the sample mean is greater than $22.50 but less an...
Data from the Bureau of Labor Statistics' Consumer Expenditure Survey show that annual expenditures for cellular...
Data from the Bureau of Labor Statistics' Consumer Expenditure Survey show that annual expenditures for cellular phone services per consumer unit increased from $223 in 2001 to $588 in 2007 Let the standard deviation of annual cellular expenditure be $43 in 2001 and $145 in 2007 [You may find it useful to reference the z table.] a. What is the probability that the average annual expenditure of 129 cellular customers in 2001 exceeded $213? (Round z value to 2 decimal...
Since neither Lisa or Brad have a very high chance of
winning, what would you set as a quota of new customers if you
wanted each of them to have at least a 25% chance of winning? Be
sure to explain how you calculated your quota.
Lisa Mendes and Brad Lee work in the sales department of an AT&T Wireless store. Lisa has been signing up an average of 48 new cell phone customers every month with a standard deviation...
A laptop company claims up to 8.0 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 7.5 hours and standard deviation 39 minutes. (a) What is the probability that the battery life is at least 8.0 hours? Round your answer to four decimal places (e.g. 98.7654) 89 (b) What...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a standard deviation of $500. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions (a) What is the likelihood the sample mean is at least $25.00 decimal places and final answer to 4 decimal places.) Round z value to 2 Probability What is the likelihood the sample mean is greater than $2250 but less...
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50, with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the following questions. (a)What is the likelihood the sample mean is at least $25.00? (Round z value to 2 decimal places and final answer to 4 decimal places.) Probability (b)What is the likelihood the sample mean is greater than $22.50 but less an...
Data from the Bureau of Labor Statistics' Consumer Expenditure Survey show that annual expenditures for cellular phone services per consumer unit increased from $223 in 2001 to $588 in 2007 Let the standard deviation of annual cellular expenditure be $43 in 2001 and $145 in 2007 [You may find it useful to reference the z table.] a. What is the probability that the average annual expenditure of 129 cellular customers in 2001 exceeded $213? (Round z value to 2 decimal...
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