Basic Math question and answers for July 28, 2023
- Q A group of studentswish to examine how pesticides affect seedling growth. Seeds arerandomly assigned to be planted in pots with soil treated withpesticide (treatment group, group 1) or in pots...
- Q You, recently participated in an experiment to test theeffectiveness of saturation patrol on residential burglaries. Priorto the experiment there were two neighborhoods (both about the samesize) in your city with...
- Q A researcher decides to analyze the effects of nutrition onpersonality. He collects 7 pairs of identical twins and randomlyassigns one twin from each pair to a controlled diet condition. Thetwins...
- Q A trucking company determined that the distance traveled pertruck per year is normally distributed, with a mean 60 thousandmiles and a standard deviation of 11 thousand miles.How many miles will...
- Q Bob Nale is the owner of Nale’s Quick Fill. Bob would like toestimate the mean number of gallons of gasoline sold to hiscustomers. Assume the number of gallons sold follows...
- Q Business StatisticsData Analysis for Managers making decisionsYou manage a line of consumer products and want to change yourmarketing campaign. You decide that you want to test a new campaignagainst the...
- Q The following data represent a company's yearly sales volume andits advertising expenditure over a period of 8 years. (Y) (X) Sales inmillions Advertising in ($10,000) 15 32 16 33 18 35 17 34 16 36(a) Develop a scatter diagram of sales versus advertising andexplain...
- Q A scientist measured the speed of light. His values are in?km/sec and have? 299,000 subtracted from them. He reported theresults of 30 trials with a mean of 756.23 and a...
- Q the data set shown? below, complete parts? (a) through? (d)below. x 3 4 5 7 8 y 5 7 8 12 13 ?(a)??Find the estimates of beta 0and beta 1....
- Q for a fixed sample size as the number of indeoendent variablesin a regression model increases the power of the regressiondecreases. T or FThe width of a 95% confidence interval around...
- Q Suppose you plan to take a survey of math students asked abouttheir overall grades. 22 students were surveyed, and it was foundthat the average GPA of the 22 sampled students...
- Q In order to determine the relationshipbetween the price of an item (X) and the quantity sold (Y), theprice of the item was varied over 10 consecutive days. Thefollowing data are...
- Q Problem #4 Mike Dreskin manages alarge Los Angeles movie theater complex called Cinema I, II, III,and IV. Each of the four auditoriums plays a different film; theschedule is set so that...
- Q A psychologist specializing in marriage counseling claims that,among all married couples, the proportion p for whom hercommunication program can prevent divorce is at least 76%. In arandom sample of 225...
- Q Use the Test Scores Data Set.Preview the document The dataconsists of standardized test scores over several years. Use thetechniques you have learned to summarize, present, and describe thedata.Create a confidence...
- Q CountingJack has a collection of 10 pairs of gloves in his wardrobe.Before a business trip, he has to pack his luggage, and he selects8 gloves, without looking at them. We...
- Q We need to find the confidence interval for the SLEEP variable.To do this, we need to find the mean and standard deviation withthe Week 1 spreadsheet. Then we can the...
- Q GRADED PROBLEM SET #8Answer each of the following questions completely. When possibleto answer using a complete sentence and offering explanation,please do so. There are a total of 20 points possible...
- Q The Hickory Furniture Co. produces sofas and chairs. Their plantuses three main resources to make furniture –wood, upholstery andlabor. The resource requirements and profits for each piece offurniture and the...
- Q Consider the Fibonacci sequence 1,1,2,3,5,8,13,21,34,55,89,…. .The first two numbers are 1 and 1. When you add these numbers youget 2 = 1+1, which becomes the third number in the sequence....
- Q WAITING LINESThe Peachtree Airport in Atlanta serves light aircraft. It has asingle runway and one air traffic controller to land planes. Ittakes an airplane 10 minutes to land and clear...
- Q The correlation between the following two lists is zero, can youexplain why? 1,2,3,4,5,6,7 7,6,5,4,5,6,7 Correlation of 1st half ofthe list is negative and between the last half of the list...
- Q Data for age (in years) and price (in hundreds of dollars) for aparticular brand of car are provided in the accompanying datatable. Presume that the assumptions for regression inferences havebeen...
- Q Suppose 229 subjects are treated with a drug that is used totreat pain and 53 of them developed nausea. Use a 0.01 significancelevel to test the claim that more than...
- Q 4000 B.C 1850 B.C. 150 A.D.131 129 128138 134 138125 136 138129 137 139132 137 141135 130 142132 136 136134 138 145140 134 137The values in the table below are...
- Q Based on data from a? college, scores on a certain test arenormally distributed with a mean of 1518 and a standard deviationof 324.Standard score Percent-3.0 0.13-2.5 0.62-2 2.28-1.5 6.68-1 15.87-0.9 ...
- Q A study of 800 homeowners in a certain area showed that theaverage value of the homes is $182,000 and the standard deviationis $15,000. Find the probability that the mean value...
- Q Faced with rising fax costs, a firm issued a guideline thattransmissions of 8 pages or more should be sent by 2-day mailinstead. Exceptions are allowed, but they want the average...
- Q Which of the following are suitable null hypotheses. If not,explain why.a. Comparing two groupsConsider comparing the average blood pressure of a group ofsubjects, both before and after they are placed...
- Q Describe the sampling distribution of ModifyingAbove p withcaret. Assume the size of the population is 25 comma 000.nequals900?, pequals0.235 Describe the shape of the samplingdistribution of ModifyingAbove p with caret....
- Q Please try to type your solution for this question, so Ican read it without a problem. I truly appreciate you for typing inadvance.The Question:For some Mechanical Engineer students, data for...
- Q A random sample of size n=500 yielded p? =0.08a) Construct a 95% confidence interval for p.b) Interpret the 95% confidence interval.c) Explain what is meant by the phrase "95% confidenceinterval."
- Q Determine the area under the standard normal curve that liesbetween the following values z=0.2 and z=1.4
- Q The annualized cost of acquiring capacity for the new barracudadrives at Seagate is calculated as $25 per unit and the contibutionmargin for the product is $45 per unit.a.) what service...
- Q A random sample of 28 statistics tutorials was selected from thepast 5 years and the percentage of students absent from each onerecorded. The results are given below. Assume the percentages...
- Q Volunteers who had developed a cold within the previous 24 hourswere randomized to take either zinc or placebo lozenges every 2 to3 hours until their cold symptoms were gone. Twenty-fiveparticipants...
- Q The data below show sport preference and age of participant froma random sample of members of a sports club. Test if sportpreference is independent of age at the 0.05 significant...
- Q Assume one has estimated a regression equation of salary(dependent variable) against years of education independentvariable). How would one go about expanding the regression model toalso estimate the gender effect (i.e.,...
- Q Please try to type your solution for this question, so Ican read it without a problem. I truly appreciate you for typing inadvance.The Question:An FBI survey shows that about 80%...
- Q What is the SST for this set of figures120.08 30.75 75.86 54.05 81.9 61.83 37.88 38.82 78.79 26.4 68.7336.85 63.83 53.84 51.08 32.83 79.77 72.3 50.21 52.94 47.94 53.0958.47 34.13...
- Q Find the mean and standard deviation of the times and iciclelengths for the data on run 8903 in data data93.dat. Find thecorrelation between the two variables. Use these five numbers...
- Q Suppose we are studying the effect of diet on height ofchildren, and we have two diets to compare: diet A (a well-balanceddiet with lots of broccoli) and diet B (a...
- Q Suppose you have four extra tickets to a football game and youare trying to determine which of your five closest friends to takewith you: Mark, Samuel, Elizabeth, James, and Mary....
- Q A hospital wants to determine if the type of treatment forpneumonia is a factor in recovery time? The table below shows thenumber of days to recovery for several randomly selected...
- Q Run a regression analysis on the following bivariate set of datawith y as the response variable.xy62.439.262.240.447.768.9120.5-36.54937.969.1-9.453.271.86613.8878.492.3-1.670.317.8Verify that the correlation is significant at an ?=0.05?=0.05.If the correlation is indeed significant, predict...
- Q Over a five-year period, the quarterly change in the price pershare of common stock for a major oil company ranged from -7% to14%. A financial analyst wants to learn what...
- Q A researcher is studying the effects of inserting questions intoinstructional material for learning. There is doubt whether thesequestions would be more effective before or after the correspondingpassage. In addition, the...
- Q A group of biochemistry researchers developed a new medicationfor treating depression. To assess if the new medication iseffective at treating depression, the researchers obtained a sampleof depressive patients from a...
- Q A researcher is studying the effects of inserting questions intoinstructional material for learning. There is doubt whether thesequestions would be more effective before or after the correspondingpassage. In addition, the...
- Q The following data were obtained from a two-factorindependent-measures experiment with n = 5participants in each treatment condition. ?What is the F-value forthe interaction/AxB effect? B1 B2 B3? A1M = 3 T = 15 SS...
- Q Please Estimate the regression line for the model. The two datasets are below. Thanks.UnemploymentInflation4.03.04.14.14.05.93.8-0.64.01.84.05.84.02.94.10.03.95.23.91.73.91.73.92.34.25.74.22.34.30.64.41.74.35.14.52.34.6-1.74.90.05.04.05.3-2.85.5-0.65.7-0.65.71.75.71.75.73.45.93.95.80.65.81.15.82.25.72.85.71.75.72.25.91.76.01.15.83.35.95.55.94.46.0-4.46.1-0.66.31.16.22.26.13.86.12.76.0-0.55.9-1.15.72.25.74.35.63.25.74.35.51.15.65.95.63.25.50.05.41.15.41.65.45.85.42.15.40.05.21.15.43.75.15.75.14.75.1-0.55.0-0.55.06.24.95.65.112.24.92.55.0-6.54.9-0.5
- Q The average number of cocktails that residents of my nursinghome drink weekly is normally distributed with mean of 12 cocktailswith a standard deviation of 3 cocktails. What is the percentilerank...
- Q A company manufactures x units of Product Aand y units of Product B, on two machines, I andII. It has been determined that the company will realize a profitof $3/unit...
- Q Consider the following time series data.Month1234567Value23112110202315Round your answers to two decimal places.a. Compute MSE using the most recent value asthe forecast for the next period.Mean squared error isWhat is the...
- Q Log onto website whereyou can observe your service bill for the last 12 months (electricbill, cell phone bill, water bill, etc.). If you do NOT feelcomfortable sharing this data, you...
- Q It is surprising (buttrue) that if 23 people are in the same room, there is about a 50%chance that at least two people will have the same birthday.Suppose you want...
- Q The accompanying data file contains monthly observations for 5years.a. Calculate the 12-month centered movingaverage. (Do not round intermediate calculations. Roundyour answers to 2 decimal places.)b. Calculate the ratio-to-moving average.(Do not...
- Q A magazine uses a survey of readers to obtain customersatisfaction ratings for the nation's largest retailers. Eachsurvey respondent is asked to rate a specified retailer in terms ofsix factors: quality...
- Q Question Sampling is the process of selecting a representativesubset of observations from a population to determinecharacteristics (i.e. the population parameters) of the randomvariable under study. Probability sampling includes all selectionmethods...
- Q The probability of committing a Type II error changes for eachalternative value of the parameter.TrueFalseWhen conducting a hypothesis test on a population proportion,the value of q is defined as p...
- Q 1) Compared the lengths of the different Harry Potter movies andthe Star Wars movies. Each series has 8 main movies that I willcompare the lengths of. I will be testing...
- Q 9. During the past six years, **** has graduated a populationaverage of µ = 43 percent of the freshmen who were admitted with apopulation standard deviation of ? = 5....
- 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 Contracts for two construction jobs are randomly assigned to oneor more of three firms A, B, and C. Let Y1 denote the number ofcontracts assigned to firm A and Y2...
- Q A recent poll asked people whether they supported passing aconstitutional amendment to ban burning of the national flag usinga 1 to 100 scale.”1” means that they do not support passing...
- Q Mother's age18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,51Female 1, 0, 2, 2, 3, 4, 7, 3, 2, 4, 7, 1, 6, 4, 5, 3, 1, 4, 0,1, 1, 1, 0, 1, 0Use the stem and leaf...
- Q Choose the t test (which mean pickONE) you think is appropriate out of the three t testslisted below to determine the t-value for the data (you can copythe results from...
- Q Regression StatisticsMultiple R0.451216205R Square0.203596063Adjusted RSquare0.190097692StandardError0.051791629Observations61ANOVAdfSSMSFSignificance FRegression10.0404582530.04045825315.0830090.000262577Residual590.1582599970.002682373Total600.19871825CoefficientsStandard ErrortStatP-valueLower 95%Upper 95%Lower 95.0%Upper 95.0%Intercept0.009873960.0067851331.4552345440.150904641-0.003703060.023450979-0.003703060.023450979S&P0.7522123320.1936852083.8836849760.0002625770.3646491261.1397755370.3646491261.139775537Current estimate given to us in the directions1.07RESIDUALOUTPUTObservationPredicted YResidualsStandard Residuals10.038198737-0.01978845-0.3853025062-0.001795740.1442571042.8088416641. How does your estimate of beta compare with the beta...
- Q A manufacturing plant bought a new machine to package itsproduct. After some testing, the plant supervisor decided that thepackages needed about 300 packing peanuts to keep the product safe.She set...
- Q Answer ASAP please!!!You are the researcher and you develop a hypothesis. It statesthat by providing relaxation therapy to a group of 10 smokers whoaverage 20 cigarettes a day, you hypothesize...
- Q A recent study found that toddlers who have a diet high inprocessed foods may have a slightly lower IQ later in life. Theconclusion came from a long-term investigation of 14,000...
- Q The following table summarizes the results of a two-factor ANOVAevaluating an independent-measures experiment with 2 levels offactor A, 3 levels of factor B, and n = 6 participants in eachtreatment...
- Q Which of the following is not a characteristic for a normaldistribution?a. It is a symmetrical distributionb. The mean is always zeroc. The mean, median, and mode are all equald. It...
- Q Question 1A residual is:choose oneThe difference between a data point and the regression line.A value that can be 1 or zero.A value that is always negative because it is a...
- Q This question has several parts that must be completedsequentially. If you skip a part of the question, you will notreceive any points for the skipped part, and you will not...
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