machines malfunction. The problem is to compute the 95% confidence interval on π‚ the proportion that malfunction in the population. Solution: The value of p is 12/40 = 0.30. The estimated value of σp is = 0.072. A z table can be used to determine that the z for a 95% confidence interval is 1.96. The limits of the confidence interval are therefore: Lower limit = .30 - (1.96)(0.072) = .16 Upper limit = .30 + (1.96)(0.072) = .44. The confidence interval is: 0.16 ≤ π ≤ .44. Q2. A manager at
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are confidence intervals? It is explained as a range of values so defined that there is a specified probability that the value of a parameter lies within it. The next question to be asked is how we form a confidence interval. The purpose of taking a random sample from a lot or population and calculating a statistic‚ such as the mean from the data‚ is to estimate the mean of the population. How well the sample statistic estimates the underlying population value is always an issue. A confidence interval
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Luis Hernandez English 3A Period 5 9/28/12 When someone describes their selves they usually say a ton of words that best fit them. Although many words help describe a person sometimes just one word is enough. The word that would best describe me I think would be pursuer. One thing that makes me a pursuer is my family‚ they raised me to never give up on my dreams and I want to do achieve my goals to give back to them. Along with that another reason is I am a pursuer because I try hard for
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When people retire If they are lucky enough to be financially stable and can travel or perhaps take up something they have always loved to do such as art or other projects; becomes active in their community then they build on that self esteem. Some people when retired are plagued with ill health and unfortunately are limited to what they can do and become depressed or bed-ridden‚ but vast majorities are still very active. Men in particular generally work three quarters of their life so it is difficult
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Should School Computer Labs Be Phased Out Alicia Hansen AED/200 5/24/2010 Tamara Wood Should School Computer Labs Be Phased Out Computers are the technology of our future. Computers are being used more and more in today’s society. People use computers at their job for many different reasons. Computers are used at schools to help look up information‚ to do essay’s and there also is a computer lab to teach students how to use a computer. Computer labs should not be phased out of
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Confidence Intervals Consider the following question: someone takes a sample from a population and finds both the sample mean and the sample standard deviation. What can he learn from this sample mean about the population mean? This is an important problem and is addressed by the Central Limit Theorem. For now‚ let us not bother about what this theorem states but we will look at how it could help us in answering our question. The Central Limit Theorem tells us that if we take very many
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My word is actually a phrase‚ my phrase is “sense of humor.” Sense of humor has a few different meanings I think. The dictionary definition for it is; the trait of appreciating and being able to express the humorous. It means to be able to appreciate‚ understand‚ and make your own humorous things. Understanding sarcasm in speaking‚ funny actions‚ and catching puns‚ etc. are some examples of things you need a sense of humor to understand. People’s sense of humor are not usually the same. Your opinions
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Merveille Agbodjogbe SPCH101 02/28/15 Speaking With Confidence The ability to speak with competence and confidence will provide empowerment. It will give me an edge that less skilled communicators lack. I’ve learned that my fear of public speaking is the most common of all phobias. It is a form of performance anxiety in which a person becomes very concerned that they will look visibly anxious‚ maybe even have a panic attack on stage. My fear of public speaking has to do with the fact that I am
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34. Information from the American Institute of Insurance indicates the mean amount of life insurance per household in the United States is $110‚000. This distribution follows the normal distribution with a standard deviation of $40‚000. a. If we select a random sample of 50 households‚ what is the standard error of the mean? b. What is the expected shape of the distribution of the sample mean? c. What is the likelihood of selecting a sample with a mean of at least $112‚000? d. What is the likelihood
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December 8‚ 2013 PSY 200 Reflection Prelude- When signing up for psychology 200‚ I expected it to be a very interesting course much like my class from high school. With such an interest in psychology‚ I hoped that this course would help determine if this was a potential major/minor to pursue. Aside from its academic aspect‚ I took psychology to gain some personal insight. With a mother diagnosed with bipolar disorder‚ along with other family members as well as myself suffering from depression
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