Basic Math question and answers for July 26, 2023
- Q Research a major (note the word major) security/ privacy breachthat occurred in the healthcare or public health domain in the last5 years. Answer the following questions.What was the impact on...
- Q A fair coin is tossed three times and theevents AA, BB, and CC are defined asfollows:A:{A:{ At least one head isobserved }} B:{B:{ At least two heads are observed }} C:{C:{ The number of heads observed is odd }}Find the following probabilities...
- Q Two hospital emergency rooms use different procedures for triageof their patients. A local health care provider conducted a studyto determine if there is a significant difference in the meanwaiting time...
- Q This problem is from 2008.The US Open is an annual two week tennis event in Flushing NY inlate August, early September.In a year with no significant rain interruption, the US...
- Q Aminah wish to perform the hypothesis testing H0: ? =1 versusH1: ? <1 versus with ?=0.10. . The sample size 25 was obtainedindependently from a population with standard deviation 10....
- Q For homes in a certain state, electric consumption amounts lastyear approximately followed a mound-shaped (normal) distributionwith a mean of 1034 kilowatt-hours and a standard deviation of 182kilowatt-hours.(a) According to the...
- Q Let p be the (unknown) proportion of males in a town of 100, 000residents. A political scientist takes a simple random sample of100 residents from this town.(a) Write down the...
- Q Please use anexample to discuss the Analysis of Variance. Please discuss whysome experts believe it should be called “Analysis ofMeans.”
- Q 3) President Trump’s approval rating is 42%. Suppose that 10people were chosen at randoma) Find the probability that 5 of the 10 people approve of thejob President Trump is doing.b)...
- Q Please discussthe purpose of hypothesis testing. In your response, provide anexample of a null hypothesis and alternative hypothesis. Why ishypothesis testing important for researchers?
- Q Part 2 – SPSS APPLICATION from this week’s assignedreadings and presentations (28 pts)Problem Set 1: The independent-samples t test(7 pts)Research Scenario: A clinical psychologist isstudying whether there is a difference...
- Q Employees from Company A and Company B both receive annualbonuses. What information would you need to test the claim that thedifference in annual bonuses is greater than $100 at the...
- Q 3. The heights of female students attending a sixth form collegehave a mean of 168 cm and standard deviation of 4.5 cm. The heightscan be modeled by a normal distribution:...
- Q 1.5 Suppose you believe that, in general, graduates who havemajored in your subject are offered higher salaries upon graduatingthan are graduates of other programs. Describe a statisticalexperiment that could help...
- Q 1. A researcher wants to determine the average given below.Describe how the researcher should apply the five basic steps in astatistical study. (Assume that all the people in the poll...
- Q The sinking of the RMS Titanic is one of the most infamousshipwrecks in history. On April 15, 1912, during her maiden voyage,the Titanic sank after colliding with an iceberg, killing...
- Q La Jolla Beverage Products is considering producing a winecooler that would be a blend of a white wine, a rose wine, andfruit juice. To meet taste specifications, the wine cooler...
- Q Georgia Cabinets manufactures kitchen cabinets that are sold tolocal dealers throughout the Southeast. Because of a large backlogof orders for oak and cherry cabinets, the company decided tocontract with three...
- Q 1. A survey administered to a random sample from a localgrocery store finds that political party is related to whether ornot they favor an increase in sales tax, leading to...
- Q An amateur astronomer is researching statistical properties ofknown stars using a variety of databases. They collect the colorindex, or B?V index, and distance (in light years) from Earth for30 stars....
- Q Explain the following:Concepts of Hypothesis TestingHypotheses Test for a population meanHypothesis test for a population proportionTest of normalityChi-Square Test for Independence
- Q Of the 93 participants in a drug trial who were given a newexperimental treatment for? arthritis, 53 showed improvement. Ofthe 92 participants given a? placebo, 48 showed improvement.Construct a? two-way...
- Q provep(aUbUc)= p(a}+P(b)+p(c)-p{ab)-p(ac)+p(abc)
- Q 1. You want to obtain a sample to estimate apopulation proportion. At this point in time, you have noreasonable preliminary estimation for the population proportion.You would like to be 95%...
- Q A travel photographer visits 10 paradise locations (N = 10) andrates each sequentially. 7, 5, 8, 5, 1, 9, 8, 11, 7, and 6 Usingthe computational formula, what is the...
- Q Why is variation in a candidate measure within populationimportant to assessing the measure validity?
- Q Use the following information to answer the first 5questions:Suppose we wanted to estimate the average age of a certain groupof divorced men during 1988 and took a random sample of...
- Q Suppose we want to know how registered voters in Kane Countyfeel about the 2016 presidential election. Specifically, we’d liketo get an overall summary, but be sure we have a representativesample...
- Q 4 [20% ](a) Prove the Sine Rule for a spherical triangle: [10%] sin ?sin a = sin ? sin b = sin ? sin c(b) Show that the area of...
- Q Suppose the heights of 18-year-old men are approximatelynormally distributed, with mean 66 inches and standarddeviation 6 inches.(a) What is the probability that an 18-year-old man selected atrandom is between 65...
- Q A courier service advertises that its average delivery time isless than 6 hours for local deliveries. A sample of 16 localdeliveries was recorded and yielded thestatistics x = 5.83hours and...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.A random sample of 5400 permanent dwellings on an entirereservation showed that...
- Q 1)Assume that a sample is used to estimate a population mean ??.Find the 99.9% confidence interval for a sample of size 585 with amean of 74.4 and a standard deviation...
- Q Suppose that the height of Australian males is a normallydistributed random variable with a mean of 176.8cm and a standarddeviation of 9.5cm.a. If the random variable X is theheight of...
- Q Determine the Best Fit Linear Regression Equation UsingTechnology - ExcelQuestionThe table shows the age in years and the number of hours sleptper day by 24 infants who were less than...
- Q (5) Suppose x has a distribution with ? = 20and ? = 16.(a) If a random sample of size n = 47 is drawn, find?x, ?xand P(20 ? x ?...
- Q Suppose there are two one-year assets. You cannot buy afractional portion of either asset. Asset A costs $100 to buy andin one year pays a total of either $120 or...
- Q Describe what qualitative forecasting models are. What are theadvantages and disadvantages of this modelling? “High correlation between two variables means that one is thecause and the other is the effect”....
- Q How do you perform Hypothesis Testing on a regression modelusing an ANOVA table below. This is to show the significance of the4 independent variables.ANOVAdfSSMSFSignificance FRegression317643.175881.0522.210.00001376Residual143706.59264.75Total1721349.76
- Q The following are quality control data for a manufacturingprocess at Kensprt Chemical Company. The data show the temperaturein degrees centigrade at five points in time during themanufacturing cycle. The company...
- Q 7.A random sample of 49 observations is drawn from a populationwith a normal distribution. If the sample mean is 265 and thesample standard deviation is 57, find the 95% confidence...
- Q The weight of football players in the NFL is normallydistributed with a mean of 200 pounds and a standard deviation of25 pounds.A) What is the probability that a randomly selected...
- Q Create a research problem that would use a statistic that wouldexplore differences(not relationships) related to something ofinterfere to you then identify the following: (a) population (b)sample (c) research hypothesis, (d)...
- Q The following data represent a company's yearly sales volume andits advertising expenditure over a period of 5 years. (Y) Sales inMillions of Dollars 15 16 18 17 16 (X) Advertising...
- Q Suppose that the lifetimes of light bulbs are approximatelynormally? distributed, with a mean of56 hours and a standard deviation of 3.3 hours. With this?information, answer the following questions.?(a) What proportion...
- Q A computer manufacturer believes that the proportion of hardwaremalfunctions is different in humid climates than in dry climates.To test this claim, the manufacturer takes a random sample of 400machines sold...
- Q A university has 15,000 students. We have drawn a simple randomsample size of 400 from the population and recorded how much moneyeach student spent on cellular telephone service during November2003....
- Q Use the sample information x¯ = 41, ? = 4, n = 20 to calculatethe following confidence intervals for ? assuming the sample isfrom a normal population. (a) 90 percent...
- Q Biased coin has Q as unknows bias. Q is uniform continuos randomvariable ranges from 0 to t ( 0 < t <= 1). t is aconstant.N = Number of toss...
- Q An amateur astronomer is researching statistical properties ofknown stars using a variety of databases. They collect the colorindex, or B?V index, and distance (in light years) from Earth for30 stars....
- Q (a) In the Monty Hall problem with 100 doors, you pick one andMonty opens 98 other doors with goats. What is the probability ofwinning (assuming you would rather have a...
- Q Teleconferences, electronic mail, and word processors are amongthe tools that canreduce the length of business meetings. A recent survey indicatedthat the percentagereduction y in time spent by business professionals in...
- Q Paint-Drying Robots. How long it takes paint to dry can have animpact on the production capacity of a business. In May 2018,Deal’s Auto Body & Paint in Prescott, Arizona, invested...
- Q You probably regard your university education as an investment.You spend your valuable time, effort, and tuition fees and inreturn you obtain a degree. The provincial and federal governementsalso regard their...
- Q a conference room holds meetings. the owner knows that theduration of these meetings is uniformly distributed from 30-90mins.a) what is the liklihood that a meeting will last between 60 and80...
- Q Below is data from theLazy R Ranch on its production and price of meats and poultry. Forthe years 2014 1nd 2015. Quantities2014 Priceper lb2014 Price per lb 2015Beef 235,000 3.49 3.79Lamb 125,000 3.89 4.00Chicken 1,000,500 2.49 2.89a. Compute the pricerelatives for...
- Q The data contained in <professional> are the number ofmales employed full time in a professional occupation in Australiafrom August quarter 1996 to August quarter 2008.Time periodMale full-time employed professionals('000)Aug-96645.6Nov-96675Feb-97661.2May-97659.9Aug-97675.2Nov-97700.5Feb-98710.7May-98697.8Aug-98711.1Nov-98733.6Feb-99751May-99730.4Aug-99704.2Nov-99725.7Feb-00735.2May-00743.7Aug-00742.7Nov-00746.4Feb-01762.7May-01760.5Aug-01765.8Nov-01752.7Feb-02759.6May-02768.6Aug-02761.1Nov-02783.3Feb-03793.4May-03772.2Aug-03768.8Nov-03786.9Feb-04799.1May-04794.7Aug-04772.5Nov-04782.2Feb-05769.7May-05798.6Aug-05823.3Nov-05841.7Feb-06848.3May-06848.2Aug-06838.2Nov-06825.1Feb-07851May-07858.9Aug-07856Nov-07875.5Feb-08889.7May-08883.2Aug-08887.9a) Plot...
- Q Seventy million pounds of trout are grown in the U.S. everyyear. Far-raised trout contain an average of 32 grams of fat perpound, with a standard deviation of 7.5 grams of...
- Q Explain how during the past Presidential election how so manystatisticians got the projections of the elections wrong?
- Q A survey of 25 randomly selectedcustomers found the ages shown? (in years). The mean is 32.32 yearsand the standard deviation is 10.66 years.?a) Construct a 99% confidence interval for the...
- Q The authors of the paper "Age and Violent Content Labels MakeVideo Games Forbidden Fruits for Youth" carried out an experimentto determine if restrictive labels on video games actuallyincreased the attractiveness...
- Q Two Way ANOVAA mechanical engineer is studying the thrust force developed bya drill press. He suspects that the drilling speed and the feedrate of the material are the most important...
- Q Q. It was thought that at a particular point in time 15% of therabbit population in a region was infected by RHDV1-K5 virus. Atthe time a researcher trapped 25 rabbits...
- Q Sampling is the process of selecting a representative subset ofobservations from a population to determine characteristics (i.e.the population parameters) of the random variable under study.Probability sampling includes all selection methods...
- Q A telephone company claims that the service calls which theyreceive are equally distributed among the five working days of theweek. A survey of 8080 randomly selected service calls wasconducted. Is...
- Q Hypothesis Testing. The researcher believesthat if pregnant women take vitamins, the birth weight of theirbabies will be greater than 7.2 pounds. The researcher feedsvitamins to 49 pregnant women and measures...
- Q One of the products produced by Branco Food Company is All-BranCereal, which competes with three other brands of similar all-brancereals. The company's research office wants to investigate if thepercentage of...
- Q (PLEASE TYPE THE ANSWERS)(STATISTICS 500)Create a research hypothesis in your area of study that would beanswered using either a two sample independent or dependent samplest test. Include the following: Introduction:...
- Q 16. A pharmaceutical manufacturer does a chemical analysis tocheck the potency of products. The standard release potency forcephalothin crystals is 910. An assay of 16 lots gives thefollowing potency data:897...
- Q What are the characteristics of chi-square distributions?
- Q Q. A study was conducted of the Gouldian finchwhich lives in North Australia. Each bird observed was classifiedaccording to "Face Color" and "Bill colour" and the results are inthe following...
- Q Suppose that a category of world class runners are known to runa marathon (26 miles) in an average of 141 minutes with a standarddeviation of 12 minutes. Consider 49 of...
- Q Let X ?{1,2} and Y ?{3,4} be independent random variables withPMF-s: fX(1) = 1 2 fX(2) = 1 2 fY (3) = 1 3 fY (4) = 2 3 Answer...
- Q Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately ?2 =5.1. Suppose...
- Q In a cereal box filling factory a randomly selected sample of 16boxes have an average weight of 470 g with a standard deviation of15g. The weights are normally distributed. Compute...
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