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A study has shown that the probability distribution of x, the number of customers in line (including the one being served, if any) at a checkout counter in a department store, is given by P (X=0) = 0.25, P(X=1) = 0.25, P(X=2) = 0.20, P(X=3)=0.20, and P(X_>4) =0.10. Considering a newly arriving customer to the checkout line.
a) what is the probability that this customer will not have to wait behind anyoneb) what is the probability that this customer will have to wait behind at least one customerc) On average, behind how many other customers will the newly arriving customer have to wait?
Descriptive statistic results from quarterly sales figures over a 18 year period (73 qtr) are below. Please interpret the standard Deviation and Median in terms of sales results,
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are 37.50 ± 0.25 cm. The company has established an -chart and an R-chart using samples of size five.
Conduct the hypothesis test and provide the test statistic, critical value and/or P- value and state the conclusion.
Forty percent of the homes constructed in the Quail Creek area include a security system. Three homes were selected at random. What is the probability all three homes selected have a security system?
Management plans to sample 150 packages per week. What is the appropriate control chart?
what are the probability of you having the disease?
Your firm has classified orders as either large or small in dollar amount and as either light or heavy in shipping weight. In the recent past, 28% of orders have been large dollar amounts
Determine a 95% confidence interval for mean amount spent by all Internet shoppers.
Assume that the master budget for Cannondale shows total variable expenses of $10,000. The budget was based on production of 5,000 units. Cannondale sells all units it produces.
Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000.
The Dept. of Labor has reported that 30% of the 2.1 million mathematical and computer scientists in the United States are women. If 3 individuals are randomly selected from this occupational group
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