Basic Math question and answers for October 10, 2023
- Q What is your favorite color? A large survey of countries,including the United States, China, Russia, France, Turkey, Kenya,and others, indicated that most people prefer the color blue. Infact, about 24%...
- Q A marketing researcher predicts that college students will bemore likely to purchase tickets for... A marketing researcherpredicts that college students will be more likely to purchasetickets for the next football...
- Q An educational psychologist wants to know if length of time andtype of training affect learning simple fractions. Fifth graderswere randomly selected and assigned to different times (from 1 to 3hours)...
- Q The mean operating cost of a 737 airplane is $2071 per day.Suppose you take a sample of 49 of these 737 airplanes and find amean operating cost of $2050 with...
- Q What is meant by a “null” hypothesis?How do you test a null hypothesis?What are alternate hypotheses? What are p-values?Explain "significance level."This is for business statistics
- Q 1. Following a normal probability distribution with a mean of200 and a standard deviation of 10, 95 percent of thepopulation will be between:200 and 220180 and 220180 and 200less than 1803....
- Q (Use Excel or R)Wenton Powersports produces dune buggies. They have threeassembly lines, “Razor,” “Blazer,” and “Tracer,” named after theparticular dune buggy models produced on those lines. Each assemblyline was originally...
- Q Use the following information to answer the next questions: Afive-sided die is rolled 100 times. Conduct a hypothesis test todetermine if the die is fair. Use a 5% level of...
- Q A recent survey reported that 63% of? 18- to? 29-year-olds in acertain country own tablets. Using the binomial? distribution,complete parts? (a) through? (e) below.?: .52 ?=6a. What is the probability...
- Q Suppose the average female brain size (in cubic centimeters) isestimated to be 3370cubic centimeters. A 1905 study by R.J.Gladstone measured the brain size of 103randomly selected deceasedfemale subjects. The data...
- Q Zippy Cola is studying the effect of its last advertisingcampaign. People chosen at random were called and asked how manycans of zippy cola they hand bought and advertisements they hadeither...
- Q Use a ? = .01 significance level to test the claim that 90%students have a Facebook account. Survey results: n=500, x=430.H0=H1=Left tail, right tail or two tail? Explain, please!Test statistic:P-value:Conclusion:
- Q PLEASE ANSWER PARTS A, C, AND D. Thank you!2.2 For diagnostic testing, let X = true status (1 = disease, 2= no disease) and Y = diagnosis (1 = positive,...
- Q A researcher wanted to test the effectiveness of three differentdoses of medication on depression levels, so she recruited 60people and split them evenly into the 3 groups. Below an ANOVAsummary...
- Q Suppose that a sample space consists of ? equally likelyoutcomes. Select all of the statements that must be true.a. Each outcome in the sample space has equal probability ofoccurring.b. Any...
- Q The following n = 10 observations are a sample from anormal population.7.3 7.0 6.4 7.4 7.6 6.3 6.9 7.6 6.4 7.0(a) Find the mean and standard deviation of these data. (Roundyour standard deviation to four decimal places.)mean standard deviation (b) Find...
- Q Construct the confidence interval for the population meanmu?.cequals=0.980.98?,x overbar equals 8.2x=8.2?,sigma?equals=0.90.9?,andnequals=5858A9898?%confidence interval formu?isleft parenthesis nothing comma nothing right parenthesis .,.?(Round to two decimal places as? needed.)
- Q Answers are in bold under questions. I just need to know how toget them, so Please show work!!A) If 25% of all vehicles at a certainemissions inspection failed the inspection....
- Q A production facility employs 16 workers on the day shift, 14workers on the swing shift, and 8 workers on the graveyard shift. Aquality control consultant is to randomly select 6...
- Q In a few more weeks, you will beadding a new member to your family – a 10-week old golden retrieverpuppy! In previous litters, the average weight of 42 puppies at...
- Q A new restaurant keeps track of the number of nightly customersat monthly intervals over the course of a year. The restaurant hasdone very little advertising; most of its publicity is...
- Q What role do variability and statistical methods play incontrolling quality?
- Q A regression analysis is conducted with 13 observations.a. What is the df value for inference about the slopebeta???b. Which two t test statistic values would give a? P-valueof0.05 for testing...
- Q Suppose x has a normal distribution with mean? = 28 and standard deviation ? = 4.a) Describe the distribution of x values for sample sizen = 4. (Round ?x to...
- Q Components of a certain type are shipped to a supplier inbatches of ten. Suppose that 49% of all such batches contain nodefective components, 27% contain one defective component, and 24%contain...
- Q QUESTION 1Which of the following scenarios are most suitable for thechi-square test for difference in proportions?Hint: There are 3 correct answers.a.You want to know whether there is any difference between...
- Q 3.4- Let Y1 = ?0 + ?1 and then for t > 1 de?ne Yt recursivelyby Yt = ?0 + Yt?1 + ?t. Here ?0 is a constant. The process...
- Q Assignment(1). In a city 25% of the people reads punch newspaper, 20% readsguidance. newspaper, 13% reads times newspaper, 10% reads bothpunch and guidance , 8% reads punch and time and...
- Q A simple random sample of size n is drawn from a population thatis normally distributed. The sample? mean, x overbar?, is found tobe 110?, and the sample standard? deviation, s,...
- Q On a planet far far away from Earth, IQ of the ruling species isnormally distributed with a mean of 119 and a standard deviation of15. Suppose one individual is randomly...
- Q Measures of Average: U.S. Census BureauThe U.S. Census Bureau reports the median family income in itssummary of census data.a) Why do you suppose it uses the median instead of themean?b)...
- Q For a normal population with a mean equal to 77 and a standarddeviation equal to 14, determine theprobability of observing a sample mean of 85 or less from a sampleof...
- Q A sample of 1600 computer chips revealed that 47% of the chipsfail in the first 1000 hours of their use. The company'spromotional literature states that 44% of the chips fail...
- Q I am working on a method section for a paper. The experiment ingeneral terms is testing to see if there is a significance betweentwo treatment groups in substance abuse recovery....
- Q A bakery would like you to recommend how many loaves of itsfamous marble rye bread to bake at the beginning of the day. Eachloaf costs the bakery $2.00 and can...
- Q 7) Personal phone calls received in the last three days by a newemployee were 4, 1, and 8. Assume that samples of size 2 arerandomly selected with replacement from this...
- Q (I need your Reference URL LINK, please)( i need Unique answer, don't copy and paste,please) (dont' use handwriting, please)Q1. Define the following terms:A. Contingency table (Introduction toBiostatistics)B. Chi-square test (Introduction...
- Q Suppose a sample of 49 paired differences that have beenrandomly selected from a normally distributed population of paireddifferences yields a sample mean d?? =4.1d¯ =4.1 of and a samplestandard deviation...
- Q 1.John has two jobs. For daytime work at a jewelry store he ispaid $15,000 per month,plus a commission. His monthly commission is normallydistributed with mean $10,000and standard deviation $2,000. John's...
- Q The World Bank collected data on the percentage of GDP that acountry spends on health expenditures ("Health expenditure," 2013)and also the percentage of woman receiving prenatal care ("Pregnantwoman receiving," 2013)....
- Q 1.) The file cats.csv contains a data set consisting of the bodyweight (in kilograms) and heart weight (in grams) for 12 cats. Givethe estimated regression line using the body weight...
- Q An economist is studying the job market in denver areaneighborhoods. Let x represent the total number of jobs in a givenneighborhood, and let y represent the number of entry-level jobs...
- Q What distribution should be used to model variance? Why?
- Q Gentle Ben is a Morgan horse at a Colorado dude ranch. Over thepast 8 weeks, a veterinarian took the following glucose readingsfrom this horse (in mg/100 ml).93 86 83 104...
- Q There are eight different jobs in a printer queue. Each job hasa distinct tag which is a string of three upper case letters.The tags for the eight jobs are: {...
- Q You may need to use the appropriate appendix table or technologyto answer this question.The following results come from two independent random samplestaken of two populations.Sample 1Sample 2n1 = 50n2 =...
- Q Consider the following matched samples representing observationsbefore and after an experiment. Assume that the sample differencesare normally distributed. Use Table 2. Before2.51.81.4-2.91.2-1.9-3.12.5 After2.93.13.9-1.80.20.6-2.52.9Let the difference be defined as Before – After.a.Construct the...
- Q Congratulations you have almost completed biostatistics and havedecided since you loved the class so much you want to be a researchscientist after you graduate. After applying for several jobs youwere...
- Q You may need to use the appropriate technology to answer thisquestion.Home values tend to increase over time under normal conditions,but the recession of 2008 and 2009 has reportedly caused the...
- Q True or false: The Markov Analysis is a type of analysis thatallows us to predict the future by using the state probabilitiesand a Matrix of Transition Probabilities.
- Q A regional transit company wants to determine whether there is arelationship between the age of a bus and the annual maintenancecost. A sample of 10 buses resulted in the following...
- Q The observations are Y1, . . . , Yn. The model is Yi = ?xi + i ,i = 1, . . . , n, where (i) x1, . ....
- Q True or False1. In a completely randomized experimental design with 10treatments, if the sample size (n) is 40 and ? = 0.05, then tukey’scritical value is q? = 4.82.2. The...
- Q At this point, we have a variety of options when choosing a testor a confidence interval. I'd like for you to walk us through yourprocess of choosing based on what...
- Q A quality characteristic X follows a Normaldistribution with mean 100 and standard deviation 2 when theproduction process is in control. Part (a): Suppose that the lower and upperspecification limits are 94...
- Q 2. Suppose that the probability that a grant proposal is awardedby a funding agency is 0.3. (a) If, for a particular year, thereare 100 proposals submitted to that agency, what...
- Q Question 12 Unsaved A sample of University of Colorado studentseach viewed one of two simulated news reports about a terroristbombing against the United States by a fictitious country. Onereport showed...
- Q Recall that Benford's Law claims that numbers chosen from verylarge data files tend to have "1" as the first nonzero digitdisproportionately often. In fact, research has shown that if yourandomly...
- Q These problems may besolved using Minitab. Copy and paste the appropriate Minitab outputinto a word-processed file. Add your explanations of the outputnear the Minitab output. DO NOT SIMPLY ATTACH PAGES...
- Q Use R to complete the following questions. You should includeyour R code, output and plots in your answer.1. Two methods of generating a standard normal random variableare:a. Take the sum...
- Q 1. Quinnipiac University conducted a telephone survey with arandomly selected national sample of 1155 registered voters. Thesurvey asked the respondents, “In general, how satisfied are youwith the way things are...
- Q Consider the following regression output with Sunday circulationof newspapers as dependent variable and Daily circulation asindependent variable. Both Sunday and Daily circulation andmeasured in thousands of copies.Dependent Variable: SundayVariable:InterceptDailyCoefficient24.7631.351Std. Error46.990.09t...
- Q The mean output of a certain type of amplifier is 496 watts witha variance of 144. If 40 amplifiers are sampled, what is theprobability that the mean of the sample...
- Q The average number of words in a romance novel is 64,290 and thestandard deviation is 17,422. Assume the distribution is normal.Let X be the number of words in a randomly...
- Q A random sample of 130 observations produced a mean of????=36.1x¯=36.1 from a population with a normal distribution and astandard deviation ?=4.87.(a) Find a 95% confidence interval for ?? ? ?(b)...
- Q The world is full of misleading messages. Many of them arecomming from the fact that people do not know how to interpretdata. Find an example of a misleading use of...
- Q The mean cost of domestic airfares in the United States rose toan all-time high of $380 per ticket. Airfares were based on thetotal ticket value, which consisted of the price...
- Q You are a public health nurse working in an elementary schoolin Hamilton, Ontario. You have seen a substantial increase in thenumber of children in your school presenting with Attention DeficitDisorder...
- Q TABLE 6-4According to Investment Digest, the arithmetic mean of theannual return for common stocks from 1926-2010 was 9.5% but thevalue of the variance was not mentioned. Also 25% of the...
- Q At Burnt Mesa Pueblo, archaeological studies have used themethod of tree-ring dating in an effort to determine whenprehistoric people lived in the pueblo. Wood from severalexcavations gave a mean of...
- Q what is the generalizability in the study on maternal healthcare quality indicator?
- Q For this problem, collect data on any variables of interest(sample size for each group of the two groups n=>30) and performa two-sided significance test for comparing two independentpopulation means. You...
- Q A researcher is testing the claim that adults consume an averageof at least 1.85 cups of coffee per day. A sample of 35 adultsshows a sample mean of 1.70 cups...
- Q How do you determine the slope of a line? Is there more than oneway to determine the slope? Why or Why not? How do you find theintercepts of a line?...
- Q Suppose you were asked to investigate which predictors explainthe number of minutes that 10- to18-year-old students spend onTwitter. To do so, you build a linear regression model with Twitterusage (Y)...
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