Statistics question and answers for July 28, 2023
- Q Consider observations of the number of wins per season byNational Football League teams over the years 1989-2008. Theobserved mean is 8 wins/season and the observed standard deviationis 3.02. A histogram...
- Q The following data are given for a two-factor ANOVA with twotreatments and three blocks.Block 1 2A 47 30B 31 29C 47 36Using the 0.05 significance level conduct a test of...
- Q Exhibit Symptom of COVID-19Study shows that about 70% of the COVID-19 patients have a drycough (which does not bring up any mucus or phlegm). To usehypothesis testing method to check...
- Q Suppose a hypertensiontrial is mounted and 18 participants are randomly assigned to oneof the comparison treatments. Each participant takes the assignedmedication and their systolic blood pressure (SBP) is recordedafter 6...
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.†Suppose a small group of 13Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q A summer camp hired 20 counselors for the summer. Ten were maleand ten were female. There is a concern that the males were paidmore for the summer work than the...
- Q A random sample of 12 second-year university students enrolledin a business statistics course was drawn. At the course’scompletion, each student was asked how many hours he or she spentdoing homework...
- Q The quarterly sales data (number of copies sold) for a collegetextbook over the past three years follow.Click on the datafile logo to reference the data.quarter year 1 year 2 year...
- Q A particular fruit's weights are normally distributed, with amean of 401 grams and a standard deviation of 40 grams.If you pick 24 fruit at random, what is the probability that...
- Q A)The life expectancy in the United States has a mean of 75 witha standard deviation of 7 years and follows a normaldistribution.What is the probability of an individual living longer...
- Q Shown below is a partial Excel output from a regressionanalysis.ANOVAdfSSMSFRegression  60ResidualTotal19140CoefficientsStandard ErrorIntercept10.002.00x1-2.001.50x26.002.00x3-4.001.00a.Use the above results and write the regression equation. [4Marks]b.Compute the coefficient of determination and fully interpret itsmeaning. [4 Marks]c.Is...
- Q Using the entire data set of 65 stocks, count up the number ofstocks in your data that have a high stock pricethat is at least $20. State this value here:___28____....
- Q A study of seat belt users and nonusers yielded the randomlyselected sample data summarized in the given table.    Number of cigarettes smoked per day0 1-14 15 and overWear seat belts...
- Q ANOVADFSSMSRegression10.09940.0994Residual590.14120.0023Total500.2406CoeffStandard ErrorIntercept-0.0130.0052S&P 500Returns14.1350.1978What return on the stock would be expected if S&P 500 Returnwas -4%?Give a 95% confidence interval for the coefficient for S&P500 Returns.Looking both at the specification of...
- Q Is the quotient of two independent geometric random variables ageometric random variable? If not, what is its distribution?
- Q A.Forty- three percent of Americans use social media and otherwebsites to voice their options about television programs (theHuffington post, November 23, 2011). Below are the results ofsurvey of 1364 individuals...
- Q A survey of 250 students is selected randomly on a largeuniversity campus. They are asked if they use a laptop in class totake notes. The result of the survey is...
- Q Sarah is the owner of Sarah’s Pub, and her best business is onFriday and Saturday nights when customers buy plenty of alcoholicbeverages (alcohol). After studying a large sample of receipts...
- Q Each day in April, you have an independent 1/4 chance ofdeciding to take a 6am run.(a) What is the probability you go on exactly 12 runs in themonth of April...
- Q howcan we achieve convergence in science?
- Q Masterfoods USA states that their color blends were selected byconducting consumer preference tests, which indicated theassortment of colors that pleased the greatest number of people andcreated the most attractive overall...
- Q Jobs and productivity! How do retail stores rate? One way toanswer this question is to examine annual profits per employee. Thefollowing data give annual profits per employee (in units of...
- Q Suppose an environmental agency would like to investigate therelationship between the engine size of​ sedans, x, and the milesper gallon​ (MPG), y, they get. The accompanying table shows theengine size...
- Q Use a one-way ANOVA test to study the price difference betweencruelty-free products and those tested on animalsSelect at least seven different products for your one-way ANOVAtest: for example, you may...
- Q Suppose that the random variables, ξ, η have joint uniformdensity f(x, y) = 2/9in the triangular region bounded by the lines x = -1 , y - -1and y =...
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