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AMART has monitored the duration of calls to its customer service line over a long period and found the duration of calls can be modelled as a normal distribution with a true mean of 5.76 minutes and a standard deviation of 1.41 minutes. What probability of calls last between 3 and 7 minutes? Give your answer to 4 decimal places.
A restaurant has an ice cream counter where it sells two main products, ice cream and frozen yogurt. The restaurant makes one order for ice cream and yogurt each week, and the store has enough space for 115 gallons of both products.
multiple choice questions based on multiple regression.1. a regression model between sales y in 1000 unit price x1 in
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
An estimate of the percentage defective in a lot of pins supplied by a vendor is desired to within 1% with a 90% confidence level.
Compute correlation loading coefficients using (a) the correlation matrix, and (b) the covariance matrix. How do the two sets of coefficients compare to each other? Are both sets equally informative? Explain (see also Exercise 3.23).
Find the value of the test statistic. Round your answer to 2 decimal places. Enter the value of the test statistic.
11) The time taken to assemble a car in a certain plant is a random variable having a normaldistribution of 20 hours and a standard deviation of 2 hours. What is the probability that a car canbe assembled at this plant in a period of time:a. le..
In a clinical study of an allergy drug, 112 of the 210 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level,
Find the probability that a course has a final exam or a research project.
What is the probability that a student selected at random from anywhere in the school system failed the test?
What type of data would you expect to get from the following questions? Make suggestions as to how these questions could be improved?
the amount to fill in a half-liter 500 ml soft drink bottle is normally distributed. the process has a standard
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