Statistics question and answers for August 23, 2023
- Q A recent 10-year study conducted by a research team at the GreatFalls Medical School was conducted to assess how age, systolicblood pressure, and smoking relate to the risk of strokes....
- Q In a random sample of 60 voters, 34 reported they voted forCandidate A and 26 reported they voted for Candidate B. Let Gdenote a random variable equal 1 if the...
- Q A child psychologist wishes to estimate the percentage offathers who watch their preschool-aged child when the mother works.What size sample should be obtained if she whises the estimate tobe within...
- Q What excel codes would one need to complete the followingfunctions?From the original sample of 100 datavalues you generated (including any outliers), create a new datacolumn and label it as Measles....
- Q 8.(a) Your local Be-Computer store has received 10 containers with100 bePads in each container. Each bePad is marked to identify thecontainer it is from. Other than that, all bePads are...
- Q which of the following is NOT a measure of dispersion?standard deviationmoderangevariance
- Q (Can you give me an example of data and calculations from thisexample below?) Hypothesis testing for the mean and P-values, lefttailed and right tailed, z test... An example to use...
- Q 5. You want to see if smoking marijuana has any effect (positiveor negative) on memory span. You pre-test subjects on the memoryspan measure, then pair up subjects who have the...
- Q In a recent study, approximately 42.5% of college students hadstudent loans. A researcher was interested in determining if theproportion of students that took out student loans differed by thefield in...
- Q home / study / math / statistics and probability / statisticsand probability questions and answers / we are going to play a gameof chance. we will roll a die (half...
- Q The following is the number of minutes to commute from home towork for a group of 25 automobile executives.43424138474540424339354652384647453330423733484946How many classes would you recommend?What class interval would you suggest? (Round...
- Q The researchers then decide to investigate whether employeesworking under sub-standard conditions experience greater workplacecohesion than the population of all workers (whose mean score is73). Test your hypothesis and interpret your...
- Q Finally, the researchers are interested in whether workplacecohesion attitudes change, as employees move from sub-optimalworking conditions to above average working conditions. Theycollect data from the same employees, first when working...
- Q R Questions Question 2In an experiment of rolling 10 dice simultaneously. Use thebinomial distribution to calculate the followings:a) The probability of getting six 6's ```{r} #INSERT YOUR ANSWERHERE ```b) The...
- Q Given the following pairs of scores from dependent samples:Pair: 1 2 3 4 5 X: 4 4 6 5 9 Y: 5 2 3 1 6 (a) State formally thehypotheses...
- Q 4. Compare thepreceding four simple linear regression models to determine whichmodel is the preferred model. Use the Significance F values,p-values for independent variable coefficients, R-squared orAdjusted R-squared values (as appropriate),...
- Q Solve the problem using the employment information in the tableon Alpha CorporationClass Limits(years of service)Frequency(Number of employees)1 – 56 – 1011 – 1516 – 2021 – 2526 – 30520251053The mean...
- Q 2.194 Comparing Global Internet Connections. In Exercise 2.120we discuss a study in which the Nielsen Company measured connectionspeeds on home computers in nine different countries in order todetermine whether connection...
- Q A regular six-sided die and a regular eight-sided die are rolledto find the sum. Determine the probability distribution for the sumof the two dice. Create a frequency histogram for the...
- Q Five cigarette manufacturers claim that their product has lowtar content. Independent random samples of cigarettes are takenfrom each manufacturer and the following tar levels (in milligrams)are recorded.Brand Tar Level (mg)A...
- Q A study was conducted to see if students’ writing skillscontinue to improve as the academic year progresses. English 101students were asked to write essays throughout the year inSeptember, December, March...
- Q For the following four questions, a group of residents wereasked about their support for a homeless shelter being opened intheir neighborhood. They were also asked about how long they hadlived...
- Q my question is about 3.2.13 which isA loan of amount L is to be repaid by n payments, starting oneperiod after the loan is made, with interest at rate I...
- Q A Study of recent graduates from BSCC revealed that for a sampleof 10 recently graduated Accounting Technology majors the meansalary was $32,000 per year with a sample standard deviation of$1,800....
- Q Past participantin a training program designed to upgrade theskills of production. Line supervisors spent an average of 500hours on the program with standard deviation of 100 hours. Assume anormal distribution.(i)...
- Q As the quality engineer for a small chain of fast foodrestaurants called McDowell’s (They’ve got the Big Mac, we’ve gotthe Big Mick), you’re interested in describing the consistency ofthe foodstuffs...
- Q Describe the center and spread of the following values:Min: 3.31Max: 5.21Std Dev. 0.4339Mean: 4.08Median: 4.021st Quartile: 3.783rd Quartile: 4.40
- Q Using a three-circle Venn Diagram, check the followingcategorical arguments for validity.A. Some advertisers try to create a new ideal state forconsumers. Some advertisers try to create dissatisfaction with theconsumer’s current...
- Q Write a 300-word post in apa format on Descriptive andInferential Statistics.Provide an example of when each would be used for decisions inbusiness.Your post should be supported by 3 peer-reviewed articles...
- Q PriceRoomsNeighborhood309.670307.480340.390346.5120298.260337.890324.1100313.280327.890325.380308.561381.3131337.4101346.2101342.491323.781329.681343.691360.7111348.391Predict the selling price for a house with nine rooms that islocated in the east-side neighborhood. Construct a 95% confidenceinterval estimate and 95% prediction interval.Perform a residual analysis on the...
- Q 13.) According to a recent​ report, 46​% of college studentinternships are unpaid. A recent survey of 120 college interns at alocal university found that 60 had unpaid internships.- Use the​...
- Q I need the CORRECT answer!!!A recent national survey found that high school students watchedan average (mean) of 7.4 movies per month with a populationstandard deviation of 0.9. The distribution of...
- Q Asset A pays $1,500 with certainty, while asset B pays $2,000with probability 0.8 or $100 with probability 0.2. If offered thechoice between assets A and B, a particular decision maker...
- Q R softwareCreate a list made up of two Vectors, two Data frames and TwoMatrices.i) Name the elements of the list appropriatelyii) Output just the two vectorsiii) Output just the two...
- Q 1. A consulting firm must decide now whether to hire a youngengineer. The main purpose of this engineer would be to work on acontract that the firm hopes to win....
- Q For a distribution where mean = 100 and s=20a) find C80 (80th percentile)b)C50c)C20d)mediane)What is the centile rank of the following scores120, 80, 110
- Q A recent study investigated tractor skidding distances along aroad in a forest. The skidding distances​ (in meters) were measuredat 20 randomly selected road sites. The data are given in theaccompanying...
- Q For a random sample of 20 automobile models, we record the value ofthe model as a new car and the value after the car has beenpurchased and driven 10 miles.1...
- Q Two players, A and B alternately and independently flip a coinand the first one who flip a head on top will win. Assume player Aflips first. If the coin is...
- Q Let X ∼Pois(µ).(a) Find an unbiased estimator of µ. Hint: recall that E(X) =µ.(b) What is the standard deviation of your estimator? Alsorecall that σ2X = µ for Poisson r.v.’s.
- Q Polyester resins reinforced with fiberglass are used tofabricate wall panels of restaurants. It is theorized that addingcement kiln dust​ (CKD) to the polyester composite will increasewall panel hardness. In a​...
- Q Let random variable X be uniformly distributed in interval [0,T].a) Find the nth moment of X about the origin.b) Let Y be independent of X and also uniformly distributed in...
- Q Given a normal population whose mean is 680 and whose standarddeviation is 48, find each of the following (use Excel to obtainmore accuracy):A. The probability that a random sample of...
- Q The number of pizzas consumed per month by university studentsis normally distributed with a mean of 8 and a standard deviationof 4. Use Excel to answer the following questions:A. What...
- Q Use the provided excel format to formulate ananswerThe Salem Board of Education wants to evaluate the efficiency ofthe town’s four elementary schools. The three outputs of theschools are■  output 1...
- Q The data set mantel in the alr4 package has a response Y andthree predictors x1, x2 and x3.(a) Apply the forward selection and backward eliminationalgorithms, using AIC as a criterion...
- Q Let X be the number of packages being mailed by a randomlyselected customer at a certain shipping facility. Suppose thedistribution of X is as follows: x 1 2 3 4...
- Q difference between stem and leaf plot and dot plot?pros and cons of each one
- Q The better-selling candies are often high in calories. Assumethat the following data show the calorie content from samples ofM&M's, Kit Kat, and Milky Way II.M&M'sKit KatMilky Way II250245200230225228240215202220235190250210180Assuming we don't...
- Q The following table contains results from the regression ofsales price (y) on lot size (x1), number of bedrooms(x2), number of bathrooms(x3) and number ofstoreys (x4). Sales price is the dependent...
- Q Suppose seafood price and quantity data for the years 2000 and2009 follow. Use 2000 as the base period.Seafood2000Qty. (lb)2000Price ($/lb)2009Price ($/lb)Halibut75,0902.012.33Lobster83,2803.623.09Tuna50,7791.871.97(a)Compute the index number (price relative) for each type ofseafood....
- Q You have two coins, one of which you know to be fair and theother of which has a probability of turning up heads of 0.7, butyou can’t tell which one...
- Q For a data set of brain volumes ​(cm3​) and IQ scores ofsevenseven ​males, the linear correlation coefficient isrequals=0.9950.995. Use the table available below to find thecritical values of r. Based...
- Q 1. You have a friend named Clarence who never heard ofstatistics before. Explain what statistics is and how it relates totoday's world. Give examples.2. You are given a list of...
- Q Why is the standard deviation of the bootstrapped distributionsmaller than that of the sample?
- Q give an example of real-world research questions that wouldrequire you to do each of the following...(a) determine whether a sample is different from apopulation(b) whether two samples (i.e., groups) are...
- Q The widths of the heads of fireworks on Dragon Island M= 91mmand standard deviation=23mm and have a normal distribution.a. By law, fireworms in the smallest 10th percentile must bereleased if...
- Q how one way of central tendency is not always the “best†way toget the one in the middle? thank you
- Q A traffic safety company publishes reports about motorcyclefatalities and helmet use. In the first accompanying data​ table,the distribution shows the proportion of fatalities by location ofinjury for motorcycle accidents. The...
- Q Measure your own heart rate in beats per minute. Post yourindividual results and corresponding z-score using a populationmean resting heart rate of 73 beats per minute and standarddeviation of 8...
- Q More than 40 million Americans are estimated to have at leastone outstanding student loan to help pay college expenses (\"40Million Americans Now Have Student Loan Debt\", CNNMoney,September 2014). Not all...
- Q Seating ZoneSeats AvailableTicket PriceMean DemandStandard DeviationFirst Level Sideline15000$100.0014500750Second Level5000$90.004750500First Level End Zone10000$80.0090001250Third Level Sideline21000$70.00170002500Third Level End Zone14000$60.0080003000Determine the distribution of total revenue using adata table. Use histogram to summarize results3...
- Q The statistics department is interested in the different factorsthat might influence a student’s score on the final exam. Theyidentify three factors to test: the student’s midterm exam score,the number of...
- Q Locate the results ofa recent survey that shows at least two variables in a newspaper,magazine, or internet article. Outline the survey data so that yourpeers can understand the variables and...
- Q 1. Thoroughly describe independent and dependent variables incomplete sentences.2. Thoroughly describe why you think they are related incomplete sentences.
- Q 1. Thoroughly describe independent and dependent variables incomplete sentences.2. Thoroughly describe why you think they are related incomplete sentences.
- Q Consider the following hypothesis test:H0: u>=71Ha:u<71A sample of 110 is used and the population standard deviation is11. Compute the -value and state your conclusion for each of thefollowing sample results....
- Q Solve the question and show all steps: Consider the probabilitydistribution shown here:Y-40-30-20-10010203040P(Y).02.07.10.15.30.18.10.06.02a. Calculate E(Y) or µ, VAR(Y) or ? 2 , and STDV(Y) or σb. Graph P(Y). Locate µ, µ...
- Q Homework 4: Probability and z scoresUse the data to answer the following questionsShow all work (*round 2 decimals places)What is the mean & SD for the distribution of scores?What is...
- Q Collect data on one response (dependent or y) variable and twodifferent explanatory (independent or x) variables. This willrequire a survey with three questions. For example: To predict astudent’s GPA (y),...
- Q Question 2:Describe the three methods of sample selection and list theadvantages and disadvantages of each method
- Q Solve the question below and show all steps: In a random sampleof 28 female students at a college, it was discovered that each ofthem possessed multiple hand bags. The number...
- Q Collect data on one response (dependent or y) variable and twodifferent explanatory (independent or x) variables. This willrequire a survey with three questions. For example: To predict astudent’s GPA (y),...
- Q 1. Create the following items in R. Show the R output providedby each object.b The matrix     1 2 3 4 5 6 7 8 9 10...
- Q . IQ is normally distributed with a mean of 100 and a standarddeviation of 15. Suppose an individual is randomly chosen. a) (3pt)Find the probability that the person has an...
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