Problem Sheet - I 1. Researcher conducted by a tobacco company indicates that the relative frequency distribution of tar content of its newly developed low-tar cigarette has a mean equal to 3.9 milligrams of tar per cigarette and a standard deviation equal to 1.0 milligram. Suppose a sample of 100 low-tar cigarettes is randomly selected from a day’s production and the tar content is measured in each. Assuming that the tobacco company’s claim is true‚ what is the probability that the mean
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13. Variance and Standard Deviation (expected). Using the data from problem 13‚ calculate the variance and standard deviation of the three investments‚ stock‚ corporate bond‚ and government bond. If the estimates for both the probabilities of the economy and the returns in each state of the economy are correct‚ which investment would you choose considering both risk and return? Why? ANSWER Variance of Stock = 0.10 x (0.25 – 0.033)2 + 0.15 x (0.12 – 0.033)2 + 0.50 x (0.04 – 0.033)2 + 0
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A population of measurements is approximately normally distributed with mean of 25 and a variance of 9. Find the probability that a measurement selected at random will be between 19 and 31. Solution: The values 19 and 31 must be transformed into the corresponding z values and then the area between the two z values found. Using the transformation formula from X to z (where µ = 25 and σ √9 = 3)‚ we have z19 = (19 – 25) / 3 = -2 and z31 = (31 - 25) / 3 = +2 From the area between z =±2 is 2(0
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STAT11-111 Business Statistics WEEK 3 and WEEK 4: WORKSHOPS ______________________________________________ This workshop is to be completed during Week 3 and Week 4 workshops and will depend on how quickly we get through the lecture material. Part A: Week 3 Exercise 4.2‚ Exercise 4.4. Exercise 4.5‚ Exercise 4.6‚ Exercise 4.7. Your tutor will discuss these 3 questions with you in the class. Exercise 4.8‚ Exercise 4.9. Exercise 4.10‚ Exercise 4.12‚ Exercise 4.14. Exercise 4.15‚ Exercise
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Assignment: Interpreting Correlational Findings Following are brief summaries of correlational findings‚ in which variables were found to be significantly associated with each other. Your task is to determine which of the three major causal models (i.e.‚ interpretations) could account for each finding. Indicate in the table below‚ by placing an X in the appropriate space‚ which of these three models could provide a possible explanation. Place an X in the space only if you judge the causal
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For this assignment I visited the Shoppers Stop store with cautiously noticing the moments of truth. • First: When I was depositing my polybag at the luggage counter I was welcomed by a person with a smile that was something good and different from the attendant present at Big Bazaar or Dmart. • Second: The second encounter was the ambience of the supermarket overall which was quite neat and lively. There was a perfume counter with a person standing and demonstrating different perfumes. In
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The Golden Moment “Joselyn‚ do you want to go potty before we go back into the pool?” I ask my two year old during the swim break. “No Mommy‚ I already peed in the pool‚” she replies back. I being to instantly feel my face begin turn every shade of red possible. I was the Mom in the beginning stages of potty training. Every mother has been in my shoes at sometime in their parenthood journey. Potty training is one of the biggest obstacles that we as parents face. Therefore‚ I would like to
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Moment of Clarity Theories of Personality/PSY230 April 13‚ 2013 Moment of Clarity In the past five years I have graduated high school‚ uprooted my life twice‚ almost died once and somewhere along the line realized what I want to do with my life. Following my first uprooting and near death experience I realized that family is something I have taken for granted throughout my life and need to get back to them to make amends. When I moved back home‚ I saw just how much my sisters not only missed
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Memorable Moments It has been said that a picture can say a thousand words. Every time it is taken out of the box or turned into an album‚ a single snapshot can offer a lifetime of memories and stories to tell. In my family‚ photographic storytelling is so essential‚ that all of us own numerous cameras and have a simple point-and-shoot on us at all times. I have hundreds of photographs in my collection‚ but there is one beautiful shot in particular that provided me with an amazing personal experience
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My brother being born prematurely was a very anxious moment in my life. He was born just below two pounds and needed to be in an incubator at the hospital for two months‚ the doctor had told my family and I. Those two months were the longest two months of my life. I feared for the worst and my mind was very unease. My family and I would visit him as much as possible‚ hoping he was okay and even still alive. My anxiousness had gotten worse when the doctors had told my family that my brother needed
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