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Show your work!!! Points will be deducted for work not shown. Q1. Here are some data on the rates of crime in several U.S. states for 2 years, 1996 and 1998 (crimes known to the police per 100,000 po
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1. In your own words, define and discuss the importance of measures of dispersion or variability in statistical analyses. How do they differ from measures of central tendency?2. A researcher wants to
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Case 2. Specialty Toys Specialty Toys, Inc., sells a variety of new and innovative children's toys.
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Information For questions 8-18, refer to the following Information: In their 1992 JAMA article A Critical Appraisal of 98. Degrees F, the Upper...
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The random variable x has the following discrete probability distribution. Complete parts a through f. x 1 4 5 8 p(x) 0.1 0.2 0.2 0.2 a. List the
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Find the following probability for the standard normal random variable 2. P(zgt;1.01) d.5652lt; 0.27) b. P(zlt; - 1.98) e. P(zlt;0) c.545252.02)...
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Inference Q2 Suppose the number of residents within five miles of each of your stores is asymmetrically distributed with a mean of 24 thousand and a...
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Fore each question, perform each of the following steps: state the hypotheses and identify the claim. find the critical value c. compute the test...
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For each question, perform each of the following steps: state the hypotheses and identify the claim. find the critical values c. compute the test...
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61 The branch manager of an outlet (Store 1) of a nationwide chain of pet supply stores wants to study characteristics of her cus- tomers. In...
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mun: 1 '- . V Armor 1: (You left thls blank) Answer 2: (You left this blank) Tests of a new light led to an estimated mean life of 1,321 hours...
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(Chung9 ) In London, half of the days have some rain. The weather forecaster is correct 2/3 of the time, i.
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Download the Citibike Trip data (Excel) for June, 2016. Load it into Tableau. Filter out all trips longer than 45 minutes (2700 seconds). We will...
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QNM222 Assignment#2 Question 1 A recent survey reported in BusinessWeek concerned the salaries of CEOs at large corporations, and whether company...
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Suppose ( * 1., In ) is a random vector as in the above exercise having a Dirichlet* distribution with parameter vector ( al . ant I ) . Then , let...
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The red lines show the confidence intervals which do not contain the actual population mean. How does the number of these misses change as you adjust...
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The electric cooperative needs to know the mean household usage of electricity by its non commercial customers in kEH per day. They need estimate to...
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A test was developed to measure depression. 100 university students took the five item test. the group of students was comprised of 30 men and 70...
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An analyst gathered the following information for a stock and market parameters: stock beta = 1.4; expected return on the Market = 11.9%; expected...
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The market risk premium the next period is 8.3% and the risk-free rate is 2. Stock Z has a beta of 0.6 and an expected return of 10.
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Contrast the population regression line and the least squares line. Define and explain the RSE and R2 metrics. Explain the benefit of using RSE in...
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Meredith Delgado owns a small firm that has developed software for organizing and playing music on a computer. Her software contains a number of...
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12 (a) Use Excel to make a scatter plot of these vehicle data, placing Weight on the X-axis and City MPG on the Y-axis. Add titles and modify the...
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The Bagel Company wishes to expand to Michigan and needs to decide where to locate its first store. A sample of 45 East Lansing residents (n1) spent...
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is the distribution for random variabie X. Find the mean and standard deviation of X. Verify that the distribution in #1 is a legitimate probability...
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acid rain caused by the reaction of certain air pollutants with rainwater, appears to be a growing problem in the northeastern united states.
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Calculate the p-value for the following conditions and determine whether or not to reject the null hypothesis. a) one-tail test, zx=1.40, and =0.05...
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(Hypothetical) In a major national survey of crime victimization, the researchers found that 20.0% of Americans age 12 or older had been a victim of...
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If a t distribution with 10 degrees of freedom. Compute P (-1.12 t 1.12) Round your answer to at least three decimal places. Consider a t...
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STAT 424 Homework 2 Due February 21, 4PM 20 pts for each problem below (in total, 100pts): 1. Let X = (X1, X2, X3)? be a random vector with zero mean...
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A researcher compares two compounds (1 and 2) used in the manufacture of car tires that are designed to reduce braking distances for SUVs equipped...
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3-2 Sales of Cool-Man air conditioners have grown steadily during the past 5 years: Year Sales 1 440 2 465 3 520 4 573 5 586 6 ?
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How can a non-linear relationship among two variables influence the correlation coefficient?
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A random square has a side of length Y -units where Y is an exponential random variable with probability density function fY (y) = exp(y) for y 0...
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We recorded the pre-statistics course grade (in percent)--------- and introductory statistics course grade ---------(in percent) for 60 community...
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Defective items a prodution process produces an item. on average,15% of all times produced are defective.
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In 1983, a random sample of 1000 scientists included 212 female scientists. A similar random sample of scientists in 1990 included 272 women.
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A researcher measures a simple reaction time (RT) task with a large sample of 1000 subjects. The data are normally distributed, with the following...
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10. Suppose a group of fteen pirates has raided a coastal village, and evenly split the gains that each of them made during this raid, so that each
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suppose you wanted to evaluate the performance of the three judges in Houston, Tx: Judge Adams, Judge Brown, and Judge Carter.
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Let X1.Xn be a random sample from a gamma distribution with parameters alpha and beta. Derive the equations whose solution yields the maximum...
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Let X1, .,Xn be a random sample from a gamma distribution with parameter alpha and beta. Derive the equations whose solution yields the mle of alpha...
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A pixel in a particular image has a random brightness, X. The distribution of X depends on whether the pixel belongs to an object (O) of interest or...
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Solution concentration . A chemist studied the concentration of a solution ( * ) over time ( * ) . Fifteen identical solutions were prepared . The...
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A simple random sample of25is drawn from a population that is normally distributed.
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Find the critical value for a left-tailed test with =0.05 and n=75 A.33 13.Find the critical value for a two-tailed test with =0.10 and n = 100 A.
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About 15% of the populaiton are hopelessly romantic. If two people are randomly selected, what is the probability both are hopelessly romantic?
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10 Bonus Points 1. Take a sample of 30 people and ask them to keep track of the number of telemarketing calls they receive during the next week.
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Help for Insomniacs In Exercise 1.
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Case Study 2: Improving E-Mail Marketing ResponseDue Week 8 and worth 160 points Read the following case study. A company wishes to improve its e-mail marketing process, as measured by an increase i
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