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We have reasons to believe that the distribution of household income for the US population is right-skewed. I am thinking about taking a random sample of 10,000 individuals from the US population and cal- culating the mean. (a) Is it possible to ascertain whether the distribution of the sample mean in this case will be normal? If yes, how did you come to this conclusion? (b) Say the true population mean of income is $90,000 and the true standard deviation is $68,000. What is the expectation and the variance of the sample mean in this case? We have reasons to believe that the distribution of household income for the US population is right-skewed. I am thinking about taking a random sample of 10,000 individuals from the US population and cal- culating the mean. (a) Is it possible to ascertain whether the distribution of the sample mean in this case will be normal? If yes, how did you come to this conclusion? (b) Say the true population mean of income is $90,000 and the true standard deviation is $68,000. What is the expectation and the variance of the sample mean in this case?.

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Question 1. [12 marks] Market research has indicated that customers are likely to bypass Roma tomatoes that weigh less than 70 grams. A produce company produces Roma tomatoes that average 74.0 grams with a standard deviation of 3.2 grams. (a) [2 marks] Assuming that the normal distribution is a reasonable model for the weights of these tomatoes, what proportion of Roma tomatoes are currently undersize (less than 70g)? (b) [2 marks] How much must a Roma tomato weigh to be among the heaviest 10%? (c ) [2 marks] The aim of the current research is to reduce the proportion of undersized tomatoes to no more than 2%. One way of reducing this proportion is to reduce the standard deviation. If the average size of the tomatoes remains 74.0 grams, what must the target standard deviation be to achieve the 2% goal? (d) [3 marks] The company claims that the goal of 2% undersized tomatoes is reached.To test this, a random sample of 25 tomatoes is taken. What is the distribution of undersized tomatoes in this sample if the company's claim is true? Explain your reasoning. Question 2: In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency output by finding the shares of dollar billing volume coming from various media categories such as network television, spot television, newspaper, radio, and so forth. Suppose that a random sample of 400 U.S. advertising agencies gives an average percentage share of billing volume from network television equal to 7.46 percent with a standard deviation of 1.42 percent. Further, suppose that a random sample of 400 U.S. advertising agencies gives an average percentage share of billing volume from spot television commercials equal to 12.44 percent with a standard deviation of 1.55 percent. Using the sample information, does it appear that the mean percentage share of billing volume from spot television commercials for the U.S. advertising agencies is greater than the mean percentage share of billing volume from network television? Explain. Module #3: Sampling Distributions, Estimates, and Hypothesis Testing Question 3: [3] Identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster. a) The instructor of this course observed at a Walnut Creek Police sobriety checkpoint at which every fifth driver was stopped and interviewed. Some drivers were arrested. b) The instructor of this course observed professional wine tasters working at a winery in Napa Valley, CA. Assume that a taste test involved three different wines randomly selected from each of five different wineries. c) The U.S. Department of Corrections collects data about returning prisoners by randomly selecting five federal prisons and surveying all of the prisoners in each of the prisons. d) In a Gallup poll, 1003 adults were called after their telephone numbers were randomly generated by a computer, and 20% of t ...

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We will now try to repeat this exercise for the Edmonton River Valley. Notice that the below cross- section (as seen during the River Valley Tour lab) is much more complex than the simple cross section in Question 5. Using all the evidence you have garnered thus far (including previous questions, your constructed cross-section, and the detailed cross section below) complete the account of the geological events that have occurred in the Edmonton River Valley near the University of Alberta. Hint: For the Cretaceous bedrock you'll want to subdivide it into the 3 units we discussed when completing your geological cross section below Edmonton earlier in this lab.Oldest (First event to occur) 1. 2. Belly River Formation deposited Bearpaw Formation deposited 3. Horshoe Canyon Formation deposited Empress Formation deposited! 4. Till deposited Glacial Lake Edmonton deposits deposited Sand dunes deposited Mazama Ash deposited 11000 year old river terraces deposited 6. 8000 year old river terraces deposited Erosion (unconformity) 7. Landsliding 8. 9. 10. 11. 12. Youngest (Last event to occur).

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Web Services What are Web Services? Your task is to write a report answering the following questions. What is the importance of Web Services? What are the components of Web Services? What are the different kinds of web services? How can a Web Service be used? What is Web Services Endpoint? Reporting and Submission The report must consider there be three or more web services. Please explain key features of web services..

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We studied photosynthesis in prokaryotes and eukaryotes. Photosynthesis first evolved in ancient cyanobacteria-like prokaryotes, and spread to eukaryotes by primary and secondary endosymbiosis. Photosynthesis in cyanobacteria and eukaryotes can be considered to be: a convergent trait a divergent trait an analogous trait a homologous trait both homologous and analogousWhich of the following statements is true? (pick one) Natural selection and gene flow are random processes Mutation, natural selection and gene flow are random processes Mutation and genetic drift are random processes Mutation, natural selection and genetic drift are random processes Mutation, natural selection and genetic drift are non-random processesIn the example of sickle-cell anemia, assume that the allele encoding the normal globin protein is " N ", and the allele encoding the mutant globin protein (associated with sickle-cell trait) is " S ". Which of the following genotypes is most advantageous in areas with high prevalence of malaria, and what MODE of selection best describes this? NS, diversifying NS, stabilizing NN, stabilizing SS, diversifying NN, directional SS, directional NS, directionalThis figure shows the distribution of 4 species of snapping shrimp in marine environments of Panama. Before the rising of the Isthmus of Panama there were already two species of shrimp. After the rising of the Isthmus of Panama, Pacific and Caribbean populations of those two ancestral species were isolated from each other and ultimately diverged to form new species, resulting in 4 total species. Which phylogeny would best reflect this evolutionary scenario? Tree 1 Tree 2 Impossible to tell.

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