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Suppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 700 and a standard deviation of 160. The supermarket is open 17 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 11700?
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
Calculate s(k) for each natural number k from 1 through 15. Are the numbers SQRT(5), PI, and -6 in the domain of the function s? What is the domain of the function s?
A sample of n = 9 individuals was selected from a normally distributed population with a mean of µ = 25 and a standard deviation σ = 6. A treatment was administered to the sample and, after treatment, the nine individuals produced the following sc..
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
Using a critical value, test hypothesis at the 1% level of significance.
In an experiment on a new drug to determine the most effective dosage and method of administration, subjects were randomly assigned to either 5, 10, 15, or 20 mg of the active drug.
Suppose a research firm conducted a study to determine the average amount of money steady smokers spend on cigarettes during a week.
Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Round the answer to 3 decimal places. Omit the "tiny_mce_markerquot; sign in your response.)
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
Determine whether the coefficient of correlation in the population is zero. Construct and interpret confidence intervals and prediction intervals for the dependent variable, number of units sold.
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