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Sally Inc. surverys customer satisfaction. Of 144 customers and finds that 108 are satisfied.
1) what is the point estimate of p the population percentage satisfied?
2) Show that the assumptions necessary to calculate a confidence interval are satisfied
3) Find the margin of error for a 95% confidence interval.
4) What is the confidence interval?
the amount of time in minutes devuted to commercials on a tv channel during any half-hour program is a random variable
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
A manufacturer of dodge balls uses a machine to inflate its new balls to a pressure of 13.5 pounds (σ =0.1). When the machine is properly calibrated, the mean inflation pressure s 13.50 pounds, but uncontrollable factors can cause the pressure of ..
an office building in new york uses thousands of fluorescent light bulb each year. the brand of bulb it currently uses
a vending macine dispenses coffee into a twelve-ounce cup. the amount of coffee dispensed into the cup is normally
the mean per capita consumption of milk per year is 113 liters with a variance of 576. if a sample of 193 people is
The goal at U.S. airports handling international flights is to clear these flights within 45 minutes. Let's interpret this to mean that 95 percent of the flights are cleared in 45 minutes
If the agency is risk neutral, use a decision tree to determine its best course of action.
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
A machine is set to pump cleanser into a process at the rate of 8 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 7.5 to 10.5 gallons per..
Here is a simple probability model for multiple-choice tests. Assume that each student has probability p of correctly answering the question chosen at random from universe of possible questions.
Decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
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