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The owner of a restaurant wants to determine the average number of customers who eat lunch...
A random sample of 49 lunch customers was taken at a restaurant. The average amount of...
A random sample of 49 lunch customers was taken at a restaurant. The average amount of time the customers in the sample stayed in the restaurant was 45 minutes with a standard deviation of 14 minutes. a. Compute the standard error of the mean. b. Construct a 99% confidence interval for the true average amount of time customers spent in the restaurant. c. With a .99 probability, how large of a sample would have to be taken to provide a...
25) Suppose Ray's Restaurant wants to know how many people on an average day are in...
25) Suppose Ray's Restaurant wants to know how many people on an average day are in their restaurant. To find this out, Ray takes a random sample of 45 past days. He finds out that there was an average of 200 people per day with a sample standard deviation (3) of 36 people. Create a 90% Confidence Interval on the number of people for an average day in Ray's Restaurant: (4 points)
The School Nutrition Association wants to study the average number of calories in home-packed lunches for...
The School Nutrition Association wants to study the average number of calories in home-packed lunches for elementary students. Specifically, they want to know if home-packed lunches have significantly more calories than the recommended 600 calories needed for daily energy and health. In a sample of 25 home-packed lunches, the average number of calories was 615 calories with a standard deviation of 30 calories. Use the appropriate analysis to determine if the average home-packed lunch is greater than 600 calories. Identify...
QUESTION 20 A local diner would like to see an increase in the number of customers...
QUESTION 20 A local diner would like to see an increase in the number of customers over the lunch hour. Currently, they average 25 customers per day over the lunch hour. They decide to offer a special menu of lunch deals at reduced rates to try to bring in more customers. Following the introduction of the new special lunch menu, they track data over the course of 24 days and find a sample mean of 35.6 customers with a standard...
The waiting time until a customer is served at a fast food restaurant during lunch hours...
The waiting time until a customer is served at a fast food restaurant during lunch hours has a skewed distribution with a mean of 2.4 minutes and a standard deviation of 0.4 minute. Suppose that a random sample of 44 waiting times will be taken. Compute the probability that the mean waiting time for the sample will be longer than 2.5 minutes. Answer: (Round to 4 decimal places.)
The owner of a computer repair shop has determined that his daily revenue has a mean...
The owner of a computer repair shop has determined that his daily revenue has a mean of $7000 and a standard deviation of $1200. The daily revenue totals for the next 30 days will be monitored. What is the probability that the mean daily revenue for the next 30 days will exceed $7325? A hotel chain is considering expanding into Gotham. As part of their consideration they want to estimate the average number of conference rooms rented daily. The population...
1)A random sample of 225 observations showed a mean of 25. The population variance is 961 Compute the lower limit of the...
1)A random sample of 225 observations showed a mean of 25. The population variance is 961 Compute the lower limit of the 93% confidence interval. NOTE: WRITE YOUR ANSWER WITH 4 DECIMAL DIGITS. DO NOT ROUND UP OR DOWN. 2) If the population standard deviation of the lifetime of a vacuum cleaner is 300 hours, how large of a sample must be taken in order to be 90% confident that the margin of error will not exceed 50 hours?
The owner of a local supermarket wants to estimate the difference between the average number of...
The owner of a local supermarket wants to estimate the difference between the average number of gallons of milk sold per day on weekdays and weekends. The owner samples 24 weekdays and finds an average of 242.462 gallons of milk sold on those days with a standard deviation of 36.143. 28 Saturdays and Sundays are sampled and the average number of gallons sold is 335.717 with a standard deviation of 43.83. If a 95% confidence interval is calculated to estimate...
A surveyor wants to estimate the average income of daily users of a transit service. The...
A surveyor wants to estimate the average income of daily users of a transit service. The surveyor would like to estimate this value to within $1,000 of the true mean with 90 percent confidence. If historic data indicates that the standard deviation for the sample estimates will be $30,000, what is the minimum sample size to estimate the mean income if the total population is 5,000 riders per day? When the actual sample was taken, the sample standard deviation was...
Question 7 (1 point) The owner of a local golf course wants to determine the average...
Question 7 (1 point) The owner of a local golf course wants to determine the average age of the golfers that play on the course in relation to the average age in the area. According to the most recent census, the town has an average age of 55.89. In a random sample of 30 golfers that visited his course, the sample mean was 45.84 and the standard deviation was 6.514. Using this information, the owner calculated the confidence interval of...
25) Suppose Ray's Restaurant wants to know how many people on an average day are in their restaurant. To find this out, Ray takes a random sample of 45 past days. He finds out that there was an average of 200 people per day with a sample standard deviation (3) of 36 people. Create a 90% Confidence Interval on the number of people for an average day in Ray's Restaurant: (4 points)
A surveyor wants to estimate the average income of daily users of a transit service. The surveyor would like to estimate this value to within $1,000 of the true mean with 90 percent confidence. If historic data indicates that the standard deviation for the sample estimates will be $30,000, what is the minimum sample size to estimate the mean income if the total population is 5,000 riders per day? When the actual sample was taken, the sample standard deviation was...
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