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A coffee company wants to make sure that there coffee is being served at the right temperature. If it is too hot, the customers could burn themselves. If it is too cold, the customers will be unsatisfied. The company has determined that they want the average coffee temperature to be 65 degrees C. They take a sample of 20 orders of coffee and find the sample mean to be equal to 70.2 C.
What does mu represent for this problem?
A. The average temperature of coffee in the sample, which is unknown.
B. The average temperature of coffee in the sample, which is 70.2.
C. The average temperature of coffee in the population, which is 70.2.
D. The average temperature of coffee in the population, which is unknown.
the weights in pounds of discarded plastic from a sample of households summary statistics are n62 x1.911 s1.065 use a
A poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?
Use the Fama-French 3-Factor model to run the following tests and alternative techniques to account for violations of the classical linear regression assumptions
The width of a confidence interval will be:
The firm uses $200,000 of its cash balance to pay off a current liabilities. Calculate the current ratio before and after this transaction.
Whirltag claims that the useful lifetime of its dishwashers is normally distributed with a mean of 3 years and a standard deviation 1 year.
poker is back. it is so popular that the internet is loaded with on-line poker sites. johnny c. is a poker enthusiast
Community college spends each year. If she wishes to be 90% confident, how large a sample is necessary if the standard deviation is known to be $80?
Assume 85% of passengers show up, 15% will not. Airline booked 11 people for 10 seats.
Find the 93% confidence interval of the true mean. If a day care center were starting up and wanted to keep tuition low, what would be a reasonable amount to charge?
A state education agency designs and administers high school proficiency exams. Historically, time to complete the exam was an average of 120 minutes.
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