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Question: 1. Suppose you want to determine the mean number of students per statistics class in your state. Describe a possible sampling method in three to five complete sentences. Make the description detailed.
2. Suppose you want to determine the mean number of cans of soda drunk each month by students in their twenties at your school. Describe a possible sampling method in three to five complete sentences. Make the description detailed.
A random sample of 36 days yielded the average daily output of 890.2 tons, with standard deviation of 19.8 tons. Use this information to make a 95% confidence interval for mean.
In each sample, the proportion of people who voted in the last election is recorded. What can be concluded about the shape of the distribution of those sample proportions?
The data in Display 3.11 are yearly skin cancer rates (cases per 100,000 people) in Connecticut, with a code identifying those years that came two years after higher than average sunspot activity and those years that came two years after lower tha..
Get the probability that the number of claims is at least 3 from Poisson Tables.
There are two rejected units. If a customer orders 180 units, what is the probability that the delivery will have at least one reject unit?
Using least squares regression analysis, what would you estimate demand to be for each month next year?
Suppose a process is considered "in control" if the variance is 0.02 mm (or less). Is there any evidence to suggest any of the three processes is out of control?
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
(Scheduling Problems Viewed as Assignment Problems) A machine can be used to perform a subset of N given tasks over T time periods. At each time period t, only a subset A(t) of tasks can be performed. Each task j has value j (t) when performed at ..
Computing probability values using normal distribution - How many students earned between $20,000 and $40,000
Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2.
A bag contains 120 balls. Out of this 120 balls 30 of them are blue, 50 of them are pink and 40 of them are green. What is the probability that you draw a blue ball out of this bag
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