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Question: A busy restaurant determined that between 6:30 P.M. and 9:00 P.M. on Friday nights, the arrivals of customers are Poisson distributed with an average arrival rate of 2.44 per minute.
a. What is the probability that at least 10 minutes will elapse between arrivals?
b. What is the probability that at least 5 minutes will elapse between arrivals?
c. What is the probability that at least 1 minute will elapse between arrivals?
d. What is the expected amount of time between arrivals?
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
A small New England college has a total of 400 students.The Math SAT is required for admission, and the mean score of all 400 students is 620. The population standard deviation is found to be 60. The formula for a 95% confidence interval yields th..
A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 available hours.
1. Explain one of the causes of the Spanish American War, and its impact on one foreign nation. 2. Describe a cause of the Great Depression.
the beer institue conducted a study with looking at beer purcheses per capita across states. some states buy more beer
Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7 grams of fat per pound.
Determine the probability that none of the calculators will be defective?
What then is the probability that a shaft will be acceptable? Suppose that the diameter of the shaft is a random variable that is Normally distributed.
Why is it inappropriate to use Table AS, the F table, on these data if we wish to find out whether or not the variability of weights is the same among male and female mice?
a researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the
the manufacturing of a layered material requires three steps which each require a certain amount of time. these steps
In a latin square experiment, with 4 different golf-ball designs (A,B,C and D); if we suppose that A is the standard golf-ball design and the other three designs are newly developed. Which statistical method must we use to compare the three new d..
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