Statistics question and answers for September 01, 2023
- Q The data below are the survival times after treatment (in days)of some advanced colon cancer patients who were treated withascorbate.248, 377, 189, 1843, 180, 537, 519, 455, 406, 365, 942,...
- Q Resuelva cada uno de los ejercicios de pruebas NOparamétricas:1. La efectividad de la publicidad para dos productos rivales(Marcas X e Y) fueron comparadas. Se hizo una investigación demercado en un...
- Q Calculate the five-number summary of the given data. 11 7 2 1718 2 13 22 16 1 20 21 20 23 24
- Q Difference between Means, Sample size selection.Explain Confidence Interval for a Mean, Total, Proportion,Standard Deviation.Methods of Selecting Random Samples.
- Q The speeds of car traveling on Interstate Highway I-35are normally distributed with a mean of 74miles per hour and a standard deviation of 6 miles per hour.(a) Find the percentage...
- Q 2. There is a 50% chance that you will study for the exam andearn the highest grade in the class, and a 75% chance that you willearn the highest grade...
- Q A computer system administrator notices that computers running aparticular operating system seem to freeze up more often as theinstallation of the operating system ages. She measures the time(in minutes) before...
- Q Two types of survey questions are open questions and closedquestions. An open question allows for any kind of? response; aclosed question allows for only a fixed response. An open questionand...
- Q Calculate the range, population variance, and populationstandard deviation for the following data set. If necessary, roundto one more decimal place than the largest number of decimal placesgiven in the data.16,20,13,5,13,11,7,15,6,11
- Q 2. Given the following descriptive statistics,N=18X bar = 11.5S sub x = 2a. find the 95% confidence interval of the population meanu.b. Suppose you know the population standard deviation =...
- Q Annual high temperatures in a certain location have been trackedfor several years. Let X represent the year and Y the hightemperature. At the 0.01 significance level, does the data belowshow...
- Q In the following problem, check that it is appropriate to usethe normal approximation to the binomial. Then use the normaldistribution to estimate the requested probabilities.Ocean fishing for billfish is very...
- Q We wish to predict the salary for baseballplayers (y) using the variables RBI (x1) and HR (x2), then we use aregression equation of the form ˆy=b0+b1x1+b2x2.HR - Home runs -...
- Q Kilgore’s Deli is a small delicatessen located near a majoruniversity. Kilgore’s does a large walk-in carry-out lunchbusiness. The deli offers two luncheon chili specials, Wimpy andDial 911. At the beginning...
- Q It is well known that a placebo, a fake medication or treatment,can sometimes have a positive effect just because patients oftenexpect the medication or treatment to be helpful. An article...
- Q A famous problem in probability comes from the game show “Let’sMake a Deal.” In it, a contestant is shown threedoors. Behind one door is a new car, and behind theother doors, there...
- Q The mean height of women in the United States (ages 20-29) is64.2 inches with a standard deviation of 2.9 inches. A randomsample of 60 women in this age group is...
- Q In the late summer of 2008, a brief war broke out between thetwo countries—Russia and Georgia. Suppose you are a researcherinterested in nationalistic attitudes in these two countries. Youdecided to...
- Q Let’s supposed that we want to choose a random sample of librarybooks. There are four ways we can choose the random sample. Basedon descriptions given below, label each as either...
- Q A carpet company advertises that it will deliver your carpetwithin 15 days of purchase. A sample of 49 past customers is taken.The average delivery time in the sample was 16.2...
- Q (Varibale= interval or ration scale)Make four frequency distribution table (with small values ofvariable like no more than 5 to6 values and have at least 30 scoresin each of the data...
- Q The weights of newbornbaby boys born at a local hospital are believed to have a normaldistribution with a mean weight of 3915 grams and a variance of429,025. If a newborn...
- Q 13. Calculate the expected loss EL if k = $22,000, sigma = 0.7and D = 0.5.14. A total of 10 units were tested over a 500-hour period. Atotal of 4...
- Q Sarah scores an 85 on an (IQ) test with a mean of 94 and astandard deviation of 10. At what percentile rank is she withrespect to the rest of the...
- Q Give a plausible example of a three-variable research problem inwhich partial correlation would be a useful analysis. Define X1,X2, and Y. Make sure that you indicate which of your threevariables...
- Q Please use Excel and show steps!! Greentrop PharmaceuticalProducts are the world leader in the area of sleep aids. Its majorproduct is “Dozealot”. The Research-and-Development Division hasdefined two alternatives to improve...
- Q Suppose x has a distribution with a mean of 70 and astandard deviation of 15. Random samples of sizen = 36are drawn.(a) Describe thex distributionand compute the mean and standard...
- Q Aninstructor believes that students do not retain as much informationfrom the lecture on a Friday compared to a Monday. To test thisbelief, the instructor teaches a small sample of college...
- Q According to government data, 66% of employed women have neverbeen married. Rounding to 4 decimal places, if 15 employed womenare randomly selected: a. What is the probability that exactly 2...
- Q Hypothesis Testing and Confidence IntervalsThe Reliable Housewares store manager wants to learn more aboutthe purchasing behavior of its"credit" customers. In fact, he is speculating about fourspecific cases shown below (a)...
- Q Please note that for all problems in this course, the standardcut-off (alpha) for a test of significance will be .05, and youalways report the exact power unless SPSS output states...
- Q a. Write the regression equation.b. Discuss the statistical significance of the model using theappropriate regression statistic at a 95% level of confidence.c. Discuss the statistical significance of the coefficient forthe...
- Q Helena judges try thousands of cases per year. In anoverwhelming majority of the cases disposed, the verdict stands asrendered. However, some cases are appealed, and of those appealed,some of the...
- Q Your leader wants you to evaluate the difference in cycle timebetween three different offices. Describe the steps you would takein the evaluation in order to provide a report so the...
- Q Let X be the number of heads in two tosses of a fair coin.Suppose a fair die is rolled X+1 times after the value of X isdetermined from the coin...
- Q In a baking competition between ten bakers, how many ways is itpossible for the top three places, (1st -2nd - 3rd place) to bedetermined?In a class of twenty students, how...
- Q 2. Three fair dice are rolled. Let X be the sum of the 3dice.(a) What is the range of values that X can have?(b) Find the probabilities of the values...
- Q In a random sample of? males, it was found that 26 write withtheir left hands and 214 do not. In a random sample of? females, itwas found that 66 write...
- Q Source: Dingley, C., & Roux, G. (2014). Therole of inner strength in quality of life and self-management inwomen survivors of cancer. Research in Nursing & Health,37(1), 32-41.IntroductionDingley and Roux (2014)...
- Q A researcher is interested in the effects of a psychedelic drugin treating post-traumatic stress disorder (PTSD). To assess if thepsychedelic may be effective in attenuating the severity of PTSDsymptoms, she...
- Q A new school district superintendent preparing to reallocateresources for physically impaired students wanted to know if theschools in the district differed in the distribution of physicallyimpaired. The superintendent tested samples...
- Q Please note that for all problems in this course, the standardcut-off (alpha) for a test of significance will be .05, and youalways report the exact power unless SPSS output states...
- Q 1. A researcher developed a painkiller and wanted to test itseffect. He recruited a group of 20 people who suffer from chronicpain of a similar level. Among these 20 participants,...
- Q Suppose we have three sets of random variables Wh, Xi, and Yj(for h= 1,...,k, i= 1,...,m, and j= 1,...,n) all of which aremutually independent. Assume that the three sets of...
- Q Using the data below, calculate the appropriate test. Dothis manually and show all steps. You can choose to do your workingin the space here OR upload your working to the...
- Q Monthly rent at an apartment complex is $500. Operating costsfollow a normal distribution with a mean of $15000 and a standarddeviation of $300 (minimum of 0). The number of apartments...
- Q Your boss tells you to analyze the comparative effectiveness oftwo existing UAVs at detecting particular “events” on the ground inthe CENTCOM area of responsibility (AOR). To do so, you are...
- Q Are America's top chief executive officers (CEOs) really worthall that money? One way to answer this question is to look at rowB, the annual company percentage increase in revenue, versus...
- Q A study was performed among 40 boys in a school in Edinburgh tolook at the presence of spermatozoa in urine samples according toage [15]. The boys entered the study at...
- Q Some sources report that the weights of? full-term newbornbabies in a certain town have a mean of99pounds and a standard deviation of0.60.6pounds and are normally distributed.a. What is the probabilitythat...
- Q Carpetland salespersons average $8000 in sales per week. SteveContois, the firm’s vice president, proposes a compensation planwith new selling incentives. Steve hopes that the results of atrial selling period will...
- Q $1M is available to invest in S or B. The percentage yield oneach investment depends on whether the econ has a good or badyear.Econ has a Good year Econ...
- Q 3) The Wall Street Journal reported that recipients of abachelor degree with major in business receive average startingsalaries of $55,000 in 2017, with a standard deviation of $4,000. Asample of...
- Q Using minitab, how do you know whether or not to reject the nullhypothesis when you are doing a chi-square test for differencesamong more than two proportions?
- Q The patient recovery time from a particular surgical procedureis normally distributed with a mean of 3 days and a standarddeviation of 1.5 days. Let X be the recovery time for...
- Q You know that y is a normally distributed variable witha variance of 9. You do not know its mean. You collect some data.For each sample below, form the 95% confidence...
- Q Please read through the entire question before answering. I'masking for assistance on how to calculate LOSS, not gain. Thankyou!The major stock market indexes had strong results in 2014. Themean one-year...
- Q The vendor at Citi Field offers a health pack consisting ofapples and oranges. The weight, X, of an apple has a normaldistribution with a mean of 9 ounces and a...
- Q The monthly value of sales for the first 3 years of arestaurant’s operation is shown below (values are in 1,000USD).Use a multiple linear regression model with dummyvariables to develop an...
- Q In this project, you will collect data from real world toconstruct a multiple regression model. The resulting model will beused for a prediction purpose. For example, suppose you areinterested in...
- Q During a study group, you and your friend discover that you havearrived (independently) at different solutions to a math problem.From past experience, you know that you generally answer questionscorrectly 75%...
- Q To prevent E. coli, meat should be cooked to an internaltemperature of at least 160°F. However, different meat pattiescooked for the same amount of time will have different finalinternal temperatures...
- Q 5. WellingtonFabrics of New Zealand produces bolts of woolen cloth for export.Each bolt contains 30 yards of fabric. Industry standards call forthe average number of defects per fabric bolt to...
- Q Use the given data to complete parts? (a) and? (b) below.x y 2.1 4 3.8 1.4 3 3.6 4.8 4.9 ?(a) Draw a scatter diagram ofthe data.Choose the correct answer...
- Q Suppose a simple random sample of size nequals49 is obtainedfrom a population with mu equals 71 and sigma equals 7. ?(a)Describe the sampling distribution of x overbar. ?(b) What is...
- Q What is the benefit of a satisfaction survey
- Q Discuss the three measures of central tendency. Give an examplefor each that applies to a police officers production in writingtickets and discusses how the measure is used. What are theadvantages...
- Q Monty hall ProblemExplain the statistical probabilities associated with the gameshow
- Q Please solve in RThe data below were collected in petri dishes, with each dishhaving the given concentration of Cadmium Chloride (X) in solution,and the growth of algae cells in the...
- Q In an exclusive suburb of Chicago, 55% of the families aremembers of the golf course, 40% are members of the tennis club, and15% are members of both the golf course...
- Q ****MUST BE FAMILIAR WITH R STUDIOPROGRAMMING*****Random samples of resting heart rates are taken from two groups.Population 1 exercises regularly, and population 2 does not. Thedata from these two samples (in...
- Q A description of workers. Each year, the Census Bureau selects adifferent and random sample of more than 3 million of households tobe interviewed in American Community Survey (ACS). The dataset...
- Q A study that assessed the effectiveness of a new drug designedto reduce repetitive behaviors in children affected with autism wasconducted. A total of 8 children with autism enrolled in the...
- Q Ina sleeping laboratory, 16 volunteers sleep an average of 7.2 hours,with a standard deviation of 1.2 hours. What would be a 90%confidence interval estimate for the mean number of hours...
- Q College students were asked to rate the spring festivals atuniversity in years 2016, 2017, and 2018. The following table showsthe students’ ratings on a scale from 0 to 100 where...
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