Basic Math question and answers for September 10, 2023
- Q Type “ineffective charts,” “ineffective graphs,” “unethicalcharts,” or some version thereof into Google Images. Find two orthree differently-designed graphs and charts and discuss why thedata visualizations are not effective.
- Q Suppose your research assistant screwed up and lost theinformation that linked the person’s identity across the two weightloss periods. This makes it impossible to run a paired t-test.Rather than start...
- Q 8. A fair coin is tossed 60 times. Find the probability that thehead appears between 22 and 40 times by usinga. binomial distribution,b. approximation of Binomial distribution by normaldistribution. Discuss...
- Q Analyses of drinking water samples for 100 homes in each of twodifferent sections of a city gave the following means and standarddeviations of lead levels (in parts per million). section 1section...
- Q Complete the following by writing a response tothree of the four following questions. For eachquestion, your response should be 2 or more paragraphs.Describe how you could use confidence intervalsto help...
- Q ID Year CornYield SoyBeanYield1 1957 48.3 23.22 1958 52.8 24.23 1959 53.1 23.54 1960 54.7 23.55 1961 62.4 25.16 1962 64.7 24.27 1963 67.9 24.48 1964 62.9 22.89 1965 74.1 24.510 1966 73.1 25.411 1967 80.1 24.512 1968 79.5 26.713 1969 85.9 27.414 1970 72.4 ...
- Q Consider the results from a completely randomized design showingcommuting times in three states. Use an appropriate Excel ANOVAtool, to test for any significant differences in commuting timesbetween the three states....
- Q A random variable is normally distributed. It has a mean of 245and a standard deviation of 21.e.) For a sample of size 35, state the mean of the sample meanand...
- Q We are considering a launch of a newtype of raisin into the packaged raisin market. To do so, wecollected product ratings on a 1-10 Likert-scale from consumersutilizing the following attributes...
- Q Describe the difference between a one tailed and a two tailedtest. What is the difference between a z test and a t test, and howdo you determine which one to...
- Q Paired Samples t-test (30pts) Suppose you are interested indeciding if a particular diet is effective in changing people’sweight. You decide to run a “within subject” experiment. You select6 people and...
- Q 3. Independent random samples of n1 = 16 and n2 = 13observations were selected from two normal populations with equalvariances. The sample means and variances are shown below:Population 1 Population...
- Q Number ofPeople Making ContributionEthnicGroup$1-50$51-100$101-150$151-200Over$200RowTotalA8264453822251B9154673022264C7468593530266D9887715430340ColumnTotal3452732421571041121(b) Find the value of the chi-square statistic for the sample.(Round the expected frequencies to at least three decimal places.Round the test statistic to three decimal places.)
- Q a. An experiment was performed on a certainmetal to determine if the strength is a function of heating time(hours). Results based on 25 metal sheets are given below. Use thesimple...
- Q Write an R function max.streak(p) that gives the length of themaximum "streak" of either all heads or all tails in 100 flips of a(possibly biased) coin whose probabilty of showing...
- Q -Formulate both null and alternative hypotheses for the client,and explain why the hypotheses need to be directional ornon-directional.-Determine what statistical test should be used to analyze thedata.-Summarize all information used...
- Q Diagrams of the normal distribution are almostmandatorySuppose that battery lives are normally distributed with a mean of12.85 hours and a standard deviation of 1.93 hours. What is theminimum sample size...
- Q NO HANDWRITTEN ANSWERS PLEASEThe most common abuse of correlation in studies is to confusethe concepts of correlation with those of causation.Good SAT scores do not cause good college grades, for...
- Q The population of Nevada, P(t), in millions of people, is afunction of t, the number of years since 2010. Explain the meaningof the statement P(8) = 3. Use units and...
- Q Bass - Samples: The bass in Clear Lake haveweights that are normally distributed with a mean of 1.9 pounds anda standard deviation of 0.8 pounds.(a) If you catch 3 random...
- Q Why are sampling distributions important to the study ofinferential statistics? In your answer, demonstrate yourunderstanding by providing an example of a sampling distributionfrom an area such as business, sports, medicine,...
- Q Norrie sees two lights flash at the same time, then oneof them flashes every 4th second, and the other flashes every 5thsecond. How many times do they flash together during...
- Q Monthly Sales7612.988393.667780.237091.189450.628220.447339.978589.487621.128067.217432.087621.697256.687821.218074.258173.287745.287398.057098.528484.657987.167041.57937.038508.258145.687802.158482.056171.198870.037906.69093.878010.376971.068800.087209.098852.658319.317982.868405.359166.747634.148315.48680.977540.099461.919414.579335.688638.787285.78376.959448.48360.167767.168072.179723.4410062.248066.428721.089389.737474.23Given their performance record and based on empiricalrule what would be the lower bound of the range of sales valuesthat contains 68% of the monthly sales?
- Q BonusUsing permutation test SAS code , do the following:Trauma dataMetabolic ExpenditureNontrauma patients: 20.1 22.9 18.8 20.9 20.9 22.7 21.4 20trauma patients: 38.5 25.8 22 23 37.6 30 24.5Part ABuild the...
- Q There were 49.7 million people with some type of long-lastingcondition or disability living in the United States in 2000. Thisrepresented 19.3 percent of the majority of civilians aged five andover...
- Q Suppose that cholesterol levels for women in the U.S. have amean of 188 and a standard deviation of 24. A random sample of 20women in the U.S. is selected. Assume...
- Q 1. Two streams (Brimer and Standifer creeks) located in the samewatershed are similar in size/shape and most habitat conditions(e.g., temperature, dissolved oxygen, channel substrate); however,they exhibit different pH values. Brimer...
- Q A man purchased a $23,000, 1-year term-life insurance policy for$375. Assuming that the probability that he will live for anotheryear is 0.989, find the company's expected gain.At the beginning of...
- Q Changes in demographic outcomes can occur because of changes inwithin-group rates and/or changes in composition. First, explainwhat that sentence means. Then take the example of falling rates ofdeath due to...
- Q Suppose that a deck of 52 cards contains 26 red cards and 26black cards. Say we use the 52 cards to randomly distribute 13cards each among two players (2 players...
- Q Sky Kitchens is the second largest airline caterer in the UnitedStates, providing nearly all the meals for passengers of threemajor airlines and several smaller commuter airlines. As part of atotal...
- Q Exercise 5a: What is the recommend number of classes for 1.5,2.2, 3.4,3.4,3.4 ,4.5, 5.1?Exercise 5b: What is a good class width?Exercise 5c: Give the frequency distribution.Exercise 5d. Make a list...
- Q Do workers prefer to buy lunch rather than pack their own lunch?A survey of employed Americans found that 75% of the 18 to 24year-olds, 77% of the 25 to 34...
- Q The NBS television network earns an average of $400,000 from ahit show and loses an averageof $100,000 on a flop. Of all shows reviewed by the network, 25%turn out to...
- Q A steel company is considering the relocation of one of itsmanufacturing plants. The company’s executives have selected fourareas that they believe are suitable locations. However, they wantto determine if the...
- Q Use R. Provide Solution and R Code within eachproblem.A study was conducted to determine the average weight of newbornbabies. The distribution of the weight of newborn babies has astandard deviation of...
- Q 8. Suppose 22% of the eggs sold at a local grocery store thatare graded “large” are smaller than that and should be graded“medium.” A random sample of 15 eggs graded...
- Q There were 13 that landed on their bases.4. Using your same data again from your 50 tosses, test theclaim that the population proportion of Kisses® chocolates thatland completely on the...
- Q I'm a little confused regarding types of data & measurementscales for statistics, including: Nominal, Ordinal, Interval andRatio.If one were to categorize class standing, (1=freshmen,2=sophomore, 3=junior and 4=Senior) would this be...
- Q 1. Objectives:1) Select a simple random sample by random number table orExcel.2) Know the sampling distribution of and, and calculate theprobabilities by excel.Q1: The director of personnel for Electronics Associates,...
- Q A factorial experiment was designed to test for any significantdifferences in the time needed to perform English to foreignlanguage translations with two computerized language translators.Because the type of language translated...
- Q (1 point) The distribution of actual weights of 8-oz chocolatebars produced by a certain machine is normal with mean 8 ounces andstandard deviation 0.13 ounces.(a) What is the probability that...
- Q Ina poll of 525 human rescourse professionals, 49.5% said that bodypiercings and tattoos were big red flags. Complete parts a throughd below.A.Among the 525 how many of them said it’s...
- Q A child development specialist is interested in learning if anew learning program increases students’ memory. 15 Subjectslearned a list of 50 words. Learning performance was measured usinga recall test. Students...
- Q Are all colors equally likely for Milk Chocolate M&M's? Datacollected from a bag of Milk Chocolate M&M's are provided.Blue Brown Green Orange Red Yellow110 47 52 103 58 50a. State the null and alternative hypotheses for testing if thecolors...
- Q Let X1, X2, X3, X4, X5 be independent continuous randomvariables having a common cdf F and pdf f, and set p=P(X1 <X2<X3 < X4 < X5).(i) Show that p does...
- Q Julia enjoys jogging. She has been jogging over a period ofseveral years, during which time her physical condition hasremained constantly good. Usually she jogs 2 miles per day. Duringthe past...
- Q Give one example (not listed in the textbook) for each scale ofmeasurement (nominal, ordinal, interval, ratio).Come up with a relationship that you think exists between 2variables. How would you study...
- Q 1. Find the critical t-value(s) for a one sample t-test given: ?= 0.01 n = 12 one-tailed test (lower-tailed critical region)a. 2.130 and -2.130b. 3.103 and -3.103c.-2.718d. -2.567e. 2.9982.Find the...
- Q The data set contains the weight (grams) of 10 mice before andafter the treatment. Weight of the mice before treatmentbefore:(200.1, 190.9, 192.7, 213, 241.4, 196.9, 172.2, 185.5, 205.2,193.7)Weight of the...
- Q Three experiments investigating the relation between need forcognitive closure and persuasion were performed. Part of the studyinvolved administering a "need for closure scale" to a group ofstudents enrolled in an...
- Q Twenty years? ago, 52?% of parents of children in high schoolfelt it was a serious problem that high school students were notbeing taught enough math and science. A recent survey...
- Q A simple random sample from a population with a normaldistribution of 100 body temperatures has a mean of 98.40 ands=0.68 degree F. Construct a 90% confidence interval.
- Q What is a simulation of a procedure such as the toss of a fair coin10 Times?How will you simulate the toss of a fair coin toss repeated 10times on a...
- Q Customers arrive at a grocery store at an average of 2.1 perminute. Assume that the number of arrivals in a minute follows thePoisson distribution. Provide answers to the following to...
- Q Answer the questions below using the appropriate statisticaltechnique. For questions involving the use of hypothesis testing,you must:1. State the null and research hypotheses2. Provide the Z(critical), T(critical), or ? 2...
- Q General guidelines:Use EXCEL or PHStat to do the necessary computer work.Do all the necessary analysis and hypothesis test constructions,and explain completely.Read the textbook Chapter 11. Solve the textbook example on...
- Q I'm doing a stats project on the correlation betweenthe amount of hours a person sleeps and their weight; proving thereis no correlation between sleep and weight gain. I have voluntarysamples...
- Q 16. In a study of the effect of prenatal cocaine use on infants,the following sample data were obtained for weights at birth: n =101, x 2700 grams ? , and...
- Q 8.44 The mean time taken to design a house plan by 40 architectswas found to be 23 hours with a standard deviation of 3.75hours.a. Construct a 98% confidence interval for...
- Q Even within a particular chain of hotels, lodging during thesummer months can vary substantially depending on the type of roomand the amenities offered. Suppose that we randomly select 50billing statements...
- Q Develop a C-code to calculate average, median and standarddeviation, using 5 numbers as data you input from the keyboard fromcalculations and compare program output with the hand calculationsshown with formula...
- Q Find the following percentile for the standard normaldistribution. Draw a sketch and show the R code:a. 91st percentileb. 9th percentilec. 75th percentiled. 25th percentilee. 6th percentile
- Q question 12:The risk of a portfolio can be lower than the risk of the twoindividual components that make up the portfolio whena.the return of the two components are negatively related.b.the...
- Q The distribution of the number of people in line at a grocerystore has a mean of 3 and a variance of 9. A sample of the numbersof people in line...
- Q The Food Marketing Institute shows that 16% of households spendmore than $100 per week on groceries. Assume the populationproportion is p = 0.16 and a sample of 900 households willbe...
- Q Assume you were asked to interview a researcher about the meritsand weaknesses of quasi-experimental designs. Criticallydiscuss the merits and weakness of a single group time seriesdesignAlso include in the answer...
- Q A group of 20 people have a Russian roulette party. Each personat the party plays (pulls the trigger) three times.In between the times they re-spin the barrel. What is a...
- Q You are given data from a company that recently laid off a largenumber of workers. The data includes the following variables:Age of the employeeNumber of years of educationMarital status (1=married/0=single)Number...
- Q Listed below are the lead concentrations in ug/g measured indifferent traditional medicines. Use a 0.05 significance level totest the claim that the mean lead concentration for all suchmedicines is less...
- Q Prove that for a Markov chain on a finite state space, no statesare null recurrent.
- Q 1. State the research hypothesis(non-directional) and the null hypothesis. Makesure you include both DV and IV in the hypotheses from #1 above2.According to the post-hoc results table, which pairs of...
- Q 1 point) If xx is a binomial random variable, compute P(x)P(x)for each of the following cases:(a) P(x?1),n=5,p=0.3P(x?1),n=5,p=0.3P(x)=P(x)=(b) P(x>3),n=4,p=0.1P(x>3),n=4,p=0.1P(x)=P(x)=(c) P(x<3),n=7,p=0.7P(x<3),n=7,p=0.7P(x)=P(x)=
- Q The accuracy of a census report on a city in southern Californiawas questioned by some government officials. A random sample of1215 people living in the city was used to check...
- Q Assignment 1:It is known that achievement test scores of all high schoolseniors in a state (in the US) have mean 60 and variance 64. On alarge high school, located in...
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