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Question: Which alternative? In each of the following situations, is the alternative hypothesis one-sided or two-sided? What are the hypotheses?
a) A college dining service wants to know if students prefer plastic or metal cutlery. They conduct a survey to find out.
b) In recent years, 10% of college juniors have applied for study abroad. The dean s office conducts a survey to see if that s changed this year.
c) A pharmaceutical company conducts a clinical trial to see if more patients who take a new drug experience headache relief than the 22% who claimed relief after taking the placebo.
d) At a small computer peripherals company, only 60% of the hard drives produced passed all their performance tests the first time. Management recently invested a lot of resources into the production system and now conducts a test to see if it helped.
Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents.
Jerry however is unsure the 0.6 probability of a favorable marketing research study is correct. How sensitive is Jerry's decision to this probability value ? How far can this probability value deviate from 0.6 without causing Jerry to change his d..
If B = "IBM's net profit will increase next year," identify the sample space and possible events that could occur. Use your judgment in arriving at an approximate probability for the event(s) and complement(s) you've identified.
When using a general LP model for transportation problems, if there are 4 sources and 3 destinations, which of the following statements is true?
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
It's your first day at the Jedi Temple, working as a lightsaber manufacturer. Your first task on the job is to analyze the control and capability of this process. Your main concern is to see if the lightsabers fit within the required length specif..
using the definitions from problem 6 define the following terms and how they relate to each othera. total variationb.
Refer to Exercise 8.17. Would a 90% con?dence interval be wider or narrower than the one that you found in that exercise? Verify your results by computing the interval.
If the M&M s are packaged in the stated proportions, how many of each color should the author have expected to get in his bag?
Set up null hypothesis for associated F test.
A store has an average of 25 people arriving each minute to checkout and each person on the average require 4 minutes to be processed at the checkout. What is the minimum number of cashiers required?
If a particular shipment of thousands of components actually has a 6 percent rate of defects, what is the probability that this whole shipment will be accepted?
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