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The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution. In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken. You are given the following observed frequencies:
Number of Cars Arriving in a 10-Minute Interval
Frequency
0
3
1
10
2
15
23
4
30
5
24
6
20
7
13
8
9
Total
150
The conclusion of the test is that the
A. arrival of cars follows a Poisson distribution
B. arrival of cars does not follow a Poisson distribution
C. test is inconclusive
D. None of these alternatives is correct.
If p denotes the p -value of the corresponding hypothesis test, which of the following is true?
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
A certain airplane has two independent alternators to provide electrical power.
What is the null and alternative hypothesis? What is your final conclusion?
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
Evaluate the performance of this decision.
This distribution is positively skewed. The standard deviation of the population is not known.
Using six-step critical value approach, at the 0.05 level of significance, is there evidence that population mean delivery time has been increased below previous population mean value of 25 minutes?
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
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