pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial‚ they wish to determine whether there is a difference between the effectiveness for women and for men. Using = .05‚ what is the value the test statistic? Women Men Sample size 50 80 Mean effect 7 6.95 Sample variance 3 4 A. t = 3.252 B. z = 0.455 C. z = 0.081 D. z = 0.151 Answer Key: D Question 2 of 10 1.0 Points A field researcher
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Business Proposal Final for Thomas Money Service ECO 561 March 17‚ 2014 Business Proposal Final Business Proposal for Thomas Money Service Inc. The current financial status of Thomas Money Service Inc. needs attention to help improve its existing goods and services to overcome the challenges faced by the economy downturn. This proposal will address those issues effecting the profitability of Thomas Money Service Inc. and strategize affective ways to overcome those obstacles to return to profitability
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Confidence Intervals and Hypothesis Testing Name: Math 256‚ Nelson 1. A soft-drink machine is regulated so that the amount of drink dispensed is approximately normally distributed with a standard deviation equal to 1.5 deciliters. Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks had an average content of 2.25 dl. 2. The heights of a random sample of 50 college students showed a mean of 174.5 centimeters. Assume the
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My lab results were similar to my hypothesis. My hypothesis was that the densest object would be the rubber stopper. In the lab results the densest object was the penny and the rubber stopper was second. My hypothesis was switched. My hypothesis was correct when I stated that the macaroni was the third densest object. My hypothesis was also correct for the dice‚ but the bead and the dice share the same density. So they are both the fourth densest item. I was wrong with my hypothesis when I placed
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Population and Sample Our topic is about harmful effects that can affect a student’s performance in school and daily life. Our population of interest would be college students as they are the demographic most subject to many negative influences. Our sample would be stratified because we want to compare the answers of each of the classes: freshman‚ sophomores‚ juniors‚ and seniors. As a result‚ we would be able to see what types of harmful effects each class of students are most concerned about
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1. The mean incubation time of fertilized eggs is 22 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (A) The 19th percentile for incubation times is ____ days? (round to the nearest whole number as needed (B) The incubation times that make up the middle 39% are ___ to ___ days? (round to nearest whole number‚ use ascending order) 2. As reported by a recent survey‚ the mean height of females 20 to 29 years old is 63.6 inches. If the
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Cigarette Smoking Over the years‚ researchers have been trying to connect smoking to lung cancer. They have finally come to this conclusion and are now trying to link smoking to other coronary heart diseases. Research has been done in many countries‚ and the results have shown that there was a moderate relationship to cigarette consumption and heart diseases. Through a regression‚ it has been proven that there is a link to the two factors. The U.S is also trying to cut their consumption in half
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R=0.86434 is positive and close to 1‚ it suggests that there is a strong positive relationship between the shoe size and the height. Next‚ let’s formulate the following data (see SHOW SIZE DATA) Using Excel to get the following descriptive statistics for both variables:
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Professor Dumonceaux Descriptive Statistics Paper 2 June 2014 Finding a New Home According to Trochim‚ “Descriptive statistics are used to describe the basic features of the data in a study. They provide simple summaries about the sample and the measures. Together with simple graphics analysis‚ they form the basis of virtually every quantitative analysis of data” (Trochim‚ 2006). For many years‚ many studies and researches have been done in real estate market. Buyers need to conduct researches
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In each of the assignments in this course‚ you will be dealing with the following scenario: American Intellectual Union (AIU) has assembled a team of researchers in the United States and around the world to study job satisfaction. Congratulations‚ you have been selected to participate in this massive global undertaking. The study will require that you examine data‚ analyze the results‚ and share the results with groups of other researchers. Job satisfaction is important to companies large and
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