Basic Math question and answers for September 02, 2023
- Q They main goal is to find either a Z score or T score for thedata belowWhat is the populationmean and the sample mean for the elevations (in feet) of the...
- Q (16.19) A class survey in a large class for first-year collegestudents asked, \"About how many hours do you study in a typicalweek?\". The mean response of the 427 students was...
- Q Answer questions 33, 34, and 35 on separate sheets ofpaper and turn in with your scantron.The ages of the Vice Presidents of the United States at the timeof their death...
- Q In a test of the hypothesis that the population mean issmaller than 50, a random sample of 10 observations is selectedfrom the population and has a mean of 47.0 and...
- Q 18. A group of Industrial Organizational psychologists wanted totest if giving a motivational speech at the end of a meeting wouldencourage office workers to have a higher output to their...
- Q Consider two models that you are to fit to a single data setinvolving three variables: A, B, and C.Model 1 : A ~BModel 2 : A ~B + C(a) When...
- Q Police response time to an emergency call is the differencebetween the time the call is first received and the time a patrolcar arrives at the scene. Over along period of...
- Q If i can have the chart filled out with work for myunderstanding. I would greatly appreciate it.An agent for a residential real estate company in a large citywould like to...
- Q Give an example of a discrete distribution which has finitefirst and second moments, but the third moment does not exist.
- Q Assuming a normal distribution with a mean of 5 and standarddeviation of 1.2, what is the P(X = 6)?00.2033-0.83330.8333Â Â Assuming the expected value of a distribution is 4and the standard deviation...
- Q A study of the career paths of hotel general managers sentquestionnaires to an SRS of 250 hotels belonging to major U.S.hotel chains. There were 127 responses. The average time these...
- Q Consider your dissertation research interests. Identify onecategorical/nominal scale IV with more than 2 categories, and threeDVs that are measured on continuous scales. Think of DV measuresthat probably are moderately correlated...
- Q A class survey in alarge class for first-year college students asked, \"About how manyminutes do you study on a typical weeknight?\" The mean response ofthe 257 students was x¯¯¯x¯ =...
- Q According to the British United Provident Association, a majorhealth care provider in the U.K., snoring can be an indication ofsleep apnea which can cause chronic illness if left untreated. Inthe...
- Q The distribution of birthweight of singletons in city ofTianjin, China is approximately normal with mean m=3,445 grams andstandard deviation = 409 grams [2]. An investigator plans toconduct a study to...
- Q In a random sample of 39 criminals convicted of a certain​crime, it was determined that the mean length of sentencing was 57​months, with a standard deviation of 7 months. Construct...
- Q Determine the sample size n needed to construct a 99​%confidence interval to estimate the population proportion when poverbar =0.68 and the margin of error equals 5​%.n=_______ ​(Round up to the...
- Q In this problem, assume that the distribution of differences isapproximately normal. Note: For degrees of freedom d.f. not in theStudent's t table, use the closest d.f. that is smaller. In...
- Q In BUSINESS, why binary integer programming(BIP) is useful? Thanks!
- Q Itis believed that the mean flight time from Seattle to New York Cityis 310 minutes. You want to test to determine if it is differentfrom this. The population standard deviation...
- Q The Laurenster Corporation needs to set up an assembly line toproduce a new product. The fol- lowing table describes therelationships among the activities that need to be completed forthis product...
- Q Given f(x,y) = 2 ; 0< x ≤ y < 1a. Prove that f(x,y) is a joint pdf.b. Find the correlation coefficient of X and Y.
- Q A clinical trial was conducted to test the effectiveness of adrug used for treating insomnia in older subjects. After treatmentwith the​ drug, 28 subjects had a mean wake time of...
- Q Over a very long period of time, a sheriff determines the meanvehicle speed on a road is 67 miles per hour, the standarddeviation is 3 miles per hour. Treat this...
- Q The fill amount of bottles of a soft drink is normally​distributed, with a mean of 1.01.0 literliter and a standarddeviation of 0.040.04 liter. Suppose you select a random sample of2525...
- Q 1.) The file cats.csv contains a data set consisting of the bodyweight (in kilograms) and heart weight (in grams) for 12 cats. Testat the 5% significance level that a positive...
- Q Starts in inches and weighed 7 pounds for a sample NationalFootball League quarterbacks quarterbackX. 77. 76. 77. 72. 76. 77Y. 248. 225. 241. 209. 225. 243Compute correlation coefficient.
- Q 10. Which of the following research situations would be mostlikely to use an independent-measures design? – 2ptsa. Examine the development of vocabulary as a group of childrenmature from age 2...
- Q 1.Toll Brothers is a luxury home builder that would like to testthe hypothesis that the average size of new homes exceeds 2,400square feet. A random sample of 36 newly constructed...
- Q ou may need to use the appropriate appendix table or technologyto answer this question.A consumer product testing organization uses a survey of readersto obtain customer satisfaction ratings for the nation's...
- Q For X ~ BIN(20, 0.6), find the following probabilities(PLEASE SHOW CLEAR WORK):P(X = 14) =P(X > 15) =P(X < 9) =
- Q In a study where the capability of a gauge was measured by theweight of paper, the following measurements were obtained: 3.4813.448 3.485 3.475 3.472 3.477 3.472 3.464 3.508 3.170 4.123...
- Q According to the British United Provident Association, a majorhealth care provider in the U.K., snoring can be an indication ofsleep apnea which can cause chronic illness if left untreated. Inthe...
- Q What are distinctions between big data, applied math, (finance/economics) and statistics?
- Q Here are summary statistics for randomly selected weights ofnewborn​ girls: nequals220​, x overbarequals30.3 ​hg, sequals6.3hg. Construct a confidence interval estimate of the mean. Use a99​% confidence level. Are these results...
- Q 1. An employment information service claims the mean annual payfor full-time workers without a high school diploma is less than$19,100. The annual pay for a random sample of 8 full-time...
- Q The number of female customers arriving to a coffee shop followa Poisson process with a mean rate of 3 per hour. The number ofmale customers arriving to the same coffee...
- Q The Consumer Reports National Research Center conducteda telephone survey of 2,000 adults to learn about the majoreconomic concerns for the future. The survey results showed that1,740 of the respondents think...
- Q A random sample of 30 stocks was selected from each of the threemajor U.S. exchanges and their performance over the previous yearwas noted. The median performance for all 90 stocks...
- Q In a recent year the average movie ticket cost $10.50, In arandom sample of 50 movie tickets from various areasWhat is the probability that the mean cost exceeds $8.50, giventhat...
- Q A systematic random sample was taken from the set of allPresidents of the United States. The data file potus heights.csvrandom sample includes the height (in inches) of each sampledPresident. (a)...
- Q I need a regression analysis done on the following numbers.ICPriceIncomeTempLag-temp0.3860.277841560.3740.2827956630.3930.2778163680.4250.288068690.4060.2727669650.3440.2627865610.3270.2758261470.2880.2677947320.2690.2657632240.2560.2777924280.2860.2828228260.2980.278526320.3290.2728632400.3180.2878340550.3810.2778455630.3810.2878263720.470.288072720.4430.2777872670.3860.2778467600.3420.2778660440.3190.2928544400.3070.2878740320.2840.2779432270.3260.2859227280.3090.2829528330.3590.2659633410.3760.2659441520.4160.2659652640.4370.268916471
- Q a.explain why stratifying the sampling in order to control theeffect of other factors is not practicalb.why is it important to specify a variable of interest and todistinguish between it and...
- Q Let x represent the average annual salary of collegeand university professors (in thousands of dollars) in the UnitedStates. For all colleges and universities in the United States, thepopulation variance of...
- Q Locate an example of a research study that uses hypothesis testing.Explain whether the study describes its hypothesis testingprocedure explicitly or implicitly, based on the explanations inthe Methodology section. Finally, discuss...
- Q Part 1The systolic blood pressure of adults in the USA is nearlynormally distributed with a mean of 120 and standard deviation of23 .Someone qualifies as having Stage 2 high blood...
- Q On April 1, 1992, New Jersey’s minimum wage was increased from$4.25 to $5.05 per hour, while the minimum wage in Pennsylvaniastayed at $4.25 per hour. Energetic students collected data on...
- Q Describe the kind of data that are collected for anindependent-measures t test and the hypotheses that the testevaluates. The key to helping formulate your explanation would beto include the assumptions...
- Q The distribution of weights for 12 month old baby boys in the USis approximately normal with mean 22.5 pounds and a standarddeviation of 2.2 pounds. a. if a 12 month...
- Q Exercise 8-31 Algo The monthly closing stock prices (rounded tothe nearest dollar) for Panera Bread Co. for the first six monthsof 2010 are reported in the following table. [You may...
- Q 1. (18.10) Emissions of sulfur dioxide by industry set offchemical changes in the atmosphere that result in \"acid rain.\" Theacidity of liquids is measured by pH on a scale of...
- Q find the sample size needed to give a margin of errorto estimate a proportion within plus minus 2% within 99% confidencewithin 95% confidence within 90% confidence assume no priorknowledge about...
- Q 2. Lactation promotes a temporary loss of bone mass to provideadequateamounts of calcium for milk production. Consider the data ontotalbody bone mineral content for a sample both during lactation (L)andin...
- Q Construct a scatter plot. Find the equation of the regressionline. Predict the value of y for each of the x-values. Use thisresource: Regression Give an example of two variables that...
- Q find the sample size needed to give with 99%confidence a margin of error of plus or minus 5% when estimatingproportion within plus minus 4% within plus minus 1%
- Q What is meant by an absolute effect in epidemiologic research?Present at least one relevant example.
- Q The College Board wanted to test whether students graduatingfrom private colleges and students graduating from publicuniversities had different amounts of student loan debt. A sampleof students from 146 private colleges...
- Q 19. Assume that females have pulse rates that are normallydistributed with a mean of mu equals 74.0 beats per minute and astandard deviation of sigma equals 12.5 beats per minute....
- Q Overproduction of uric acid in the body can be an indication ofcell breakdown. This may be an advance indication of illness suchas gout, leukemia, or lymphoma.†Over a period of...
- Q The 90 students in a statistics class are categorized by genderand by the year in school. The numbers are listed in the followingtable:Year in SchoolFreshmanSophmoreJuniorSeniorGenderMale14817Female2317137Test the null hypothesis that there...
- Q A survey was conducted to study if parental smoking isassociated with the incidence of smoking in children when theyreach high school. Randomly chosen high school students were askedwhether they smoked...
- Q Young Professional magazine was developed for a target audienceof recent college graduates who are in their first 10 years in abusiness/professional career. In its two years of publication, themagazine has...
- Q Is the bottled water you are drinking really purified water? Ina four-year study of bottled water brands conducted by the NaturalResources Defense Council found that 25% of bottled water is...
- Q Salaries of 32 college graduates who took a statistics course incollege have a​ mean,x overbarx​,of $ 65,300. Assuming a standard​deviation,sigmaσ​,of​$13,299​,construct a 95​% confidence intervalfor estimating the population mean muμ.​$nothingless than<muμless...
- Q A sample of 15 measurements, randomly selected from a normallydistributed population, resulted in a sample mean,x¯¯¯=6.1 and sample standard deviation s=1.92.Using α=0.1, test the null hypothesis that μ≥6.4against the alternative...
- Q 3. In the following situations, identify the random variable ofinterest (e.g. â€Let X be the number of ...â€). Then state whether ornot the r.v. is binomial, justifying your answer.(a) A...
- Q To examine the effect of pets in stressful situations,researchers recruited 21 women and 21 men who said they were doglovers.Seven of each gender were randomly assigned to each ofthree groups...
- Q TV advertising agencies face increasing challenges in reachingaudience members because viewing TV programs via digital streamingis gaining in popularity. A poll reported that 57% of 2342 Americanadults surveyed said they...
- Q Suppose you have a theory that your organization's back safetytraining program is not producing notable results in reducing backinjuries.  Your theory is that performing more backsafety training is not corresponding to...
- Q The American Bankers Association reported that, in a sample of125 consumer purchases in France, 63 were made with cash, comparedwith 26 in a sample of 50 consumer purchases in the...
- Q A company is experimenting with synthetic fibers as a substitutefor natural fibers.The quality characteristic of interest is the breaking strength.A random sample of 8 natural fibers yields an average breakingstrength...
- Q Consider the following hypothesis test:H 0:Â Â Â 20H a:Â Â < 20A sample of 50 provided a sample mean of 19.4. The populationstandard deviation is 2.a. Compute the value of the test statistic (to2...
- Q A new roller coaster at an amusement park requires individualsto be at least​ 4' 8\"​(56 inches) tall to ride. It is estimated that the heights of​10-year-old boys are normally distributed...
- Q A newspaper publisher is considering launching a new \"national\"newspaper in Anytown. It is believed that the newspaper would haveto capture over 12% of the market in order to be financiallyviable....
- Q Going back to problem 1, in real life you can, without muchdifficulty, get the mean grade of Prof. Lax’s classes but that isabout it; meaning you will have no idea...
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