Statistics question and answers for September 03, 2023
- Q A catalog sales company promises to deliver orders placed on theInternet within 3 days.? Follow-up calls to a few randomly selectedcustomers show that a 90?% confidence interval for the proportionof...
- Q A student wonders if people of similar heights tend to date eachother. She measures herself, her roommate and the women in theadjoining rooms; then she measures the next man each...
- Q An article reported the following data on oxidation-inductiontime (min) for various commercial oils: 88 104 130 160 180 195 132145 213 105 145 151 153 136 87 99 95 119...
- Q A young investment manager tells his client that the probabilityof making a positive return with his suggested portfolio is 94%. Ifit is known that returns are normally distributed with a...
- Q The May 1, 2009, issue of a certain publication reported thefollowing home sale amounts for a sample of homes in Alameda, CAthat were sold the previous month (1,000s of $)....
- Q CASE STUDY: Chest Sizes of ScottishMilitiamen (p. 306):Chest SizeFrequency333341935813618937409387533910624010824193542646433134416845504618473481The population mean and population standard deviationof the chest circumferences are 39.85 and 2.07, respectively,identify the normal curve that should be used...
- Q 1. Test the claim that the proportion of people who own cats issignificantly different than 30% at the 0.2 significancelevel.The null and alternative hypothesis would be:a) H0:??0.3Ha:?>0.3b) H0:p?0.3Ha:p<0.3c) H0:??0.3Ha:?<0.3d) H0:p?0.3Ha:p>0.3e)...
- Q Describe examples of situations where you could appropriatelyuse the following. Explain why the procedure is the correct one touse and identify the statistic to be used and explain why that...
- Q Discuss recommendations for best practices in StructuralEquation Modeling.
- Q Provided below are summary statistics for independent simplerandom samples from two? normally-distributed populations. Conductthe required hypothesis test and obtain the specified confidenceinterval.xbar=12, s1=2.4, n1=20, xbar2=11, s2=7, n2=15a) Right-tailed test, a=0.05....
- Q The home run percentage is the number of home runs per 100 timesat bat. A random sample of 43 professional baseball players gavethe following data for home run percentages.1.62.41.26.62.30.01.82.56.51.82.72.01.91.32.71.71.32.12.81.43.82.13.41.31.52.92.60.04.12.91.92.40.01.83.13.83.21.64.20.01.21.82.4(a) Use...
- Q Must Show Work. Based on her own experiences in court, a prosecutorbelieves that some judges provide more severe punishments thanother judges for people convicted of domesticviolence. Five of the most recent domestic...
- Q Run a regression analysis on the following bivariate set of datawith y as the response variable. x y 37.2 26.9 66.2 41.4 80.9 37.683.7 45 55 31.2 46.3 29.1 82...
- Q 7. Assume a population of 46?, 51?, 53?, and 59. Assume thatsamples of size n=2 are randomly selected with replacement from thepopulation. Listed below are the sixteen different samples.Complete parts?(a?)...
- Q Identify the level of measurement of each of the followingvariables: a)The amount of resistance a suspect displays toward thepolice, measured as not resistant, somewhat resistant, or veryresistant B)The number of...
- Q Assume that student are to be sperated into a group with IQscores in the bottom 30%, a second group with scores in the middle40%, and a third group with scores...
- Q A statistical analysis is made of the midterm and final scoresin a large course, with the following results:Average midterm score = 65, SD = 10,Average final score = 65, SD...
- Q The table shows the 2013 per capita total expenditure on healthin 35 countries with the highest gross domestic product in thatyear. Health expenditure per capita is the sum of public...
- Q With reference to equations (4.2)and (4.3), let Z1 = U1 and Z2 =?U2 be independent, standard normal variables.Consider the polar coordinates of the point (Z1,Z2), that is,A2 = Z2...
- Q Discuss two ways to adjust crude death rate
- Q Stats I, Item # Q-02At the Joseph Biden Middle School in Down-the-Shore, Delaware,student reading comprehension was evaluated, both pre-test andpost-test, bookending a pilot program intervention advocated by thedistrict superintendent and...
- Q Carbon monoxide concentrations (in µg/m3 ) are measured on 6different days in city A and on 4 different days in city B. Thefollowing measurements have been obtained in cities A...
- Q In a study on the physical activity of young adults, pediatricresearchers measured overall physical activity as the total numberof registered movements (counts) over a period of time and thencomputed the...
- Q (a)Evaluate the following set of data for possible and probableoutliers.5 8 2 9 5 3 7 4 2 7 4 10 4 3 17(b) A firm pays 5/12 of its...
- Q A data set lists earthquake depths. The summary statistics arenequals600?, x overbarequals6.69 ?km, sequals4.25 km. Use a 0.01significance level to test the claim of a seismologist that theseearthquakes are from...
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