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Question: Response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. John knows this and it is not sure to wait for an answer. What is the probability that for the reply to John's request.
(a) Will take longer than 10 minutes?
(b) Shorter than 10 minutes?
(c) If the mean service is now 2 minutes, what is the probability that it takes longer than 10 minutes?
Standardize the value according to the given average and SD - unstandardize the value according to the given average and SD
The researcher expects a 12-point treatment effect and plans to use a two-tailed hypothesis test with a = 0.05.
The sample mean is less than 124 grams then the supermarket returns the entire consignment of biscuits to the producer. What is the probability that a consignment will be returned?
Find the critical values and identify the rejection regions. Calculate d and sd. Use the t-test to find the standardized test statistic t. decide whether to reject or fail to reject the null hypothesis.
Calculate the MEAN and STANDARD DEVIATION for the distribution below:
A statistical analysis of 1000 long distance telephone calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed with u=240 seconds and sigma = 40 seconds.
The thickness of a flange on an aircraft component is uniformly distributed between 0.95 and 1.05 millimeters. Determine the cumulative distribution function of flange thickness.
For full marks use the coded method and round your answer to 1 decimal place.Find the slope for the trend-line.What is the intercept of the trend-line.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 3.3 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.
What does the coefficient of determination tell you about the variation in attendance and the variation in the number of exhibitors?
Standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than 13 years?
Media Disk, Inc. duplicates over a million 3.5" floppy disks each year by copying masters to stacks of blank disks. The company buys its blank stock from two different suppliers, A and B.
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