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In: Statistics and Probability

(15) Consider a sample of nine wait times measured in seconds at a drive through coffee...

  1. (15) Consider a sample of nine wait times measured in seconds at a drive through coffee shop. The sample mean is 95 and the sample standard deviation is 23.516. The population mean and standard deviation are 100 and 20 respectively. (1) What is the size of the sampling error in this case?
  1. (3) What is the probability that the average wait time would be less than 80 seconds?
  2. (3) What is the probability that the average wait time would be more than 109 seconds?
  3. (5) What is the probability that the average wait time would be between 90 and 95 seconds?
  4. (3) What is the probability that a customer waits more than 65 seconds?

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Consider a sample of nine wait times measured in seconds at a drive through coffee shop....
Consider a sample of nine wait times measured in seconds at a drive through coffee shop. The sample mean is 95 and the sample standard deviation is 23.516. The population mean and standard deviation are 100 and 20 respectively. (1) What is the size of the sampling error in this case? (3) What is the probability that the average wait time would be less than 80 seconds? (3) What is the probability that the average wait time would be more...
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Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at...
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Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. Construct a 90​% confidence interval estimate of the mean​ drive-through service time for Restaurant X at​ dinner; then do the same for Restaurant Y. Compare the result Click the icon to view the data on​ drive-through service times. Service Times (seconds) Restaurant X - 81 126 122 142 263 181 124 153 163 214 329 310 178 116 160 146...
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