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In a shipment of 12 room air conditioners, there are 3 with defective thermostats. Three air conditioners will be selected at random and inspected one after another. Find the probability that:
(a) All three are good(b) The first 2 are good and the third defective(c) Two are good and one defective
When the rats In the sample reach 10 weeks old, each rat is weighed. The mean weight for this sample is M=974. Sketch the appropriate distribution, and locate the critical region for the alpha level =.05.
Why is statistical significance not necessarily of practical important difference to a business decision? Provide an example and explain.
Make a pie chart or other indicator that expresses the market position of your fictitious IS business in terms of its top five products or services.
A group of young businesswomen wish to open a high fashion boutique in a vacant store, but only if the average income of households in the area is at least $25,00.A random sample of 9 households showed the following results:
If a worker is chosen at random, what is the probability that he or she.Is very improbable to switch jobs. Is somewhat likely or very likely to switch jobs.
We will test to determine if there evidence of an improvement on the final examination, at the 1% significance level. What is the alternate hypothesis?
If 20 students in the class said they frequently experience stress in their daily lives, would you be surprised? Explain and use statistics to support your answer
weights were measured for 5 female and 5 male beetle pupae. test the hypothesis of no difference in mean weight of
How many commuters must be randomly selected to estimate the mean driving times of Chicago commuters? If we want 99% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 1..
Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.
Given the following data from two independent samples, conduct a one-tailed hypothesis test to determine if the first sample mean is larger than the second sample mean, given a 0.05 level of significance.
Describe different methods of establishing correlation between variables and provide an example for each and explain the advantages and disadvantages of each method and where each must be applied.
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