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A random sample of 25 lunch orders at Noodles and Company showed a mean bill of 10.36 with a asample standard deviation of 5.31$. FInd the 95% confidence interval for the mean bill of the lunch orders.
Construct a 98% confidence interval for the population mean and interpret the result (round margin of error E to the nearest dollar).
the number of taxicabs waiting outside a popular downtown bar can be modeled as a poisson random variable. the
questiona a municipal bond service in the us has three rating categories a b and c. suppose that of the total number of
a competency test has scores with a mean of 69 and a standard deviation of 4. a histogram of the data shows that the
three different assembly methods have been proposed for a new product. a completely randomized three different assembly
question 1current weekly demand forecast for an item follows a normal distribution with a mean of 100 units with a
The State Department of education requires local school districts to keep records on all students within their district. Determine if the following items are categorical or numeric variables.
a bar owner was observing how many drinks his clients had on a saturday night. a sample of 24 customers randomly
a sample of 85 male professors at a major four-year university produced a mean annual pay of 75600 and a standard
Car X used k gallons of gas while traveling p miles, and car Y used s gallons of gas while traveling r miles. What was the ratio of the number of miles per gallon for car X to the number of miles per gallon for the car Y?
Define the decision rule. Calculate the value of the test statistic.
Suppose that a company claims that their mean weekly sales are $12,250. A random sample 35 weeks yields a sample mean of with a sample standard deviation of s=$1250.
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