Statistics question and answers for August 03, 2023
- Q Using the sample 3, 4, 6, 1, 10, 6Find the median, mean, mode, and rangeFind the standard deviationUsing the sample 8, 5, 1, 5, 2, 3Find the median, mean, mode,...
- Q Using the data set below:ScoreFrequency20-30530-40840-501350-601260-705Draw a HistogramDraw a polygonAfter listening to YouTube “histogram and polygon,â€explain how histogram is different and similar topolygon.
- Q Business Scores on the Graduate Management AssociationTest (GMAT) are approximately normally distributed. The mean scorefor 2013–2015 was 552 with a standard deviation of 121. For thefollowing exercises, find the probability...
- Q The data in the table is the number of absences for 77 studentsand their corresponding grade.Number of Absences33556666667788Grade3.93.93.83.82.92.92.72.72.42.42.32.31.91.9Step 1 of 5 : Calculate the sum of squared errors (SSE). Use...
- Q 68% of all Americans are home owners. If 36 Americans arerandomly selected, find the probability thata. Exactly 23 of them are are home owners.b. At most 23 of them are...
- Q What is a project timeline? assume give a time line for aproject you would work on that has at least three tasks
- Q i want all part in R code(1) The purity of oxygen produced by a fractionation process andthe percentage of hydrocarbons in the main condensor of theprocessing unit, (2) The weight...
- Q 1. A researcher is interested to learn if there is a linearrelationship between the hours in a week spent exercising and aperson’s life satisfaction. The researchers collected the followingdata from...
- Q Multiple choice1. Suppose Ho: yogurt containers average 8 ounces and Ha: yogurtcontainers average >8 ounces. you made a type 2 error. What isthe impact of this? A.not enough information to...
- Q For all of these questions don't use the p value method insteaduse the \"5 steps of hypothesis testing.\" Or I will get all of thesewrong and I really need the...
- Q 1. The Crown Bottling Company has installed a new bottlingprocess that will fill 12- ounce bottles of Cola. Both overfillingand underfilling of bottles is undesirable. The company wishes tosee whether...
- Q Scores on a certain intelligence test for children between ages13 and 15 years are approximately normally distributed with μ=101and σ=15.(a) What proportion of children aged 13 to 15 years old...
- Q An article in Electronic Packaging and Production (2002, vol.42) considered the effect of X-ray inspection of integratedcircuits. The radiation dose (rads) were studied as a function ofcurrent (in milliamps) and...
- Q Consider the set of ordered pairs shown below. Assuming that theregression equation is y with caret=5.322-0.029x and theSSE=18.794​, construct a​ 95% prediction interval for x=6.    x 4 6 3 3...
- Q Consider the following set of dependent and independentvariables. Use this data to complete parts a and b below.Construct a​ 95% confidence interval for the regressioncoefficient for x1y  x1  x210  2  ...
- Q Probabilities and areas under a curveDiscuss why probabilities for the normal distribution and othercontinuous distributions are the same as areas under the curve fora given interval.
- Q               Areyou approximately normal?     A study found that only 60% of all married women say that theywould marry the same man “if they could do it all over againâ€. Ifwe randomly sample...
- Q A) According to the National Institute of Health, 34% of adultsin the United States are overweight. Suppose we sample 20 adults.Let X denote the number of overweight people among them.What...
- Q BINOMIAL PROBABILITIES Big Box Store (BBS) has an annual rate of4% of all sales being returned. In a recent sample of thirtyrandomly selected sales the number of returns was five....
- Q Below is the probability distribution for X which representsthe number of cutthroat trout caught in a six-hour period atPyramid Lake, Nevada.                    x     0     1     2     3      4  .                p(x)   .44   .36           .04    .01     Find the missing probability.Find...
- Q #32Is there a relation between police protection and fireprotection? A random sample of large population areas gave thefollowing information about the number of local police and thenumber of local fire-fighters...
- Q BINOMIAL PROBABILITIES Big Box Store (BBS) has an annual rate of4% of all sales being returned. In a recent sample of thirtyrandomly selected sales the number of returns was five....
- Q In 2018, as a way of commemorating the 10-year anniversary ofthe release of the first smartphone, an undergraduate studentpolled a random sample of 26 her peers in hopes of estimating...
- Q The distribution of ages of all the employees in Company Xfollows a normal distribution. The average age is 40 and thestandard deviation is 5.Find the Z-score of a 50 year...
- Q Consider a case-control study of the possible associationbetween alcohol consumption and the risk of esophageal cancer asreported by Tyns et al. (1977). The study entailed 200 malesdiagnosed with esophageal cancer...
- Q n1=37, n2=37, s1= 7.4345, s2= 3.4927, x1= 23.237, x2 = 22.526Please perform: One Hypothesis test, an F test for the equality ofthe variances of travel Times and the second test...
- Q A population has a mean of 50 and a standard deviation of 5. Asample of 100 observations will be taken. The probability that themean from that sample will be between...
- Q #33 BabitaTurbid water is muddy or cloudy water. Sunlight is necessary formost life forms; thus turbid water is considered a threat towetland ecosystems. Passive filtration systems are commonly used toreduce...
- Q what is a bootstrap in statistics? How do we get p-values andconfidence intervals using bootstrapping?
- Q Write a short essay on scientific writing and explain itsdifferent components?
- Q The profit function for two products is:    Profit = −3x12 + 42x 1 − 3x22 + 48x 2 + 700,where x 1 represents units of production ofproduct 1, and x 2...
- Q A probability of 1 is the same as a probability of 100%The difference between interval and ordinal data is thatinterval data has a natural zero.If you are doing a study...
- Q 2. To raise awareness of its capabilities, FedEx developed asales promotion that was sent to selected offices. To assess thepossible benefit of the promotion, FedEx pulled the shippingrecords for a...
- Q Twenty-one daily responses of stack loss (y) (the amount ofammonia escaping) were measured with air flow x1, temperature x2,and acid concentration x3.Check the significance of the model using ANOVA via...
- Q #16A random sample of companies in electric utilities (I),financial services (II), and food processing (III) gave thefollowing information regarding annual profits per employee (unitsin thousands of dollars).IIIIII49.555.139.143.525.337.232.941.110.927.929.532.638.139.415.536.242.620.7Shall we reject or...
- Q Bighorn sheep are beautiful wild animals found throughout thewestern United States. Let x be the age of a bighorn sheep(in years), and let y be the mortality rate (percent thatdie)...
- Q Starting salaries of 110 college graduates who have taken astatistics course have a mean of $42,647. Suppose the distributionof this population is approximately normal and has a standarddeviation of $10,972.Using...
- Q A sample is selected from a population with µ= 50.After a treatment is administered to the individuals in the sample,the mean is found to be M= 55 and the variance...
- Q JenStar tracks their daily profits and has found that thedistribution of profits is approximately normal with a mean of$16,900.00 and a standard deviation of about $650.00. Using thisinformation, answer the...
- Q To investigate the fluid mechanics of swimming, twenty swimmerseach swam a specified distance in a water-filled pool and in a poolwhere the water was thickened with food grade guar gum...
- Q The null and alternate hypotheses are:H0 : μ1 =μ2H1 : μ1 ≠μ2A random sample of 10 observations from one population revealeda sample mean of 23 and a sample standard deviation...
- Q Be sure to clearly state the hypotheses in thehypothesis tests and state the conclusions in terms of the problem.Use ?=.?? for all tests.The following table presents shear strength (in kN/mm)...
- Q An administrator wanted to study the utilization oflong-distance telephone service by a department. One variable ofinterest (let’s call it X) is the length, in minutes, oflong-distance calls made during one...
- Q 3) A random sample of 1001 Americans aged 15 or olderrevealed that the amount of time spent eating or drinking per dayis 1.22 hours, with a standard deviation of 0.65hours.a)...
- Q Interstate Batteries are supposed to last at least 3 years. Aconsumer advocate collects a random sample of 200 of thesebatteries and finds that 186 last at least 3 years. Does...
- Q a random variable X has the following pmf:X-101P[X]0.250.50.25Define Y = X2 & W= Y+2.Which one of the following statements is nottrue?V[Y] = 0.25.E[XY] = 0.E[X3] = 0.E[X+2] = 2.E[Y+2] =...
- Q 1)Â Â Â Â Â Â Â Â The populationstandard deviation for waiting times to be seated at a restaurantis known to be 10 minutes. An expensive restaurant claims that theaverage waiting time for dinner is approximately...
- Q For the next 3 questions, please read the description below.Researchers want to estimate the mean monthly electricity bill in alarge urban area using a simple random sample of 100 households.Their...
- Q The data from data217.dat contains information on 78seventh-grade students. We want to know how well each of IQ scoreand self-concept score predicts GPA using least-squares regression.We also want to know...
- Q The Mean life expectancy of Men in the U.S. is 78 years , with apopulation standard deviation of 7 years. A new study is using arandom sample of 64 men...
- Q 1.) In a recent​ survey,66​% of the community favored building apolice substation in their neighborhood. If 14 citizens are​chosen, find the probability that exactly 5 of them favor thebuilding of...
- Q An experiment examined the impact of THC (the active ingredientin marijuana) on various physiological and psychological variables.The study recruited a sample of 18 young adults who were habitualmarijuana smokers. Subjects...
- Q A study was undertaken to investigate the effectiveness of anaquarobic exercise program for patients with osteoarthritis. Aconvenience sample of 70 individuals with arthritis was selected,and each person was randomly assigned...
- Q Cats are visual animals and enjoy watching on-line videos. A newon-line video enhanced for feline viewing is being developed. Themean time that a cat will view the video in one...
- Q Please use the following information for Questions 2, 3, and4.To determine whether there was a relationship between the regionof the world that you live in and the amount of beer...
- Q #15How productive are U.S. workers? One way to answer this questionis to study annual profits per employee. A random sample ofcompanies in computers (I), aerospace (II), heavy equipment (III),and broadcasting...
- Q The roulette wheel has 38 slots. Two of the slots are green, 18are red, and 18 are black. A ball lands at random in one of theslots. A casino offers...
- Q An engineer has designed a valve that will regulate waterpressure on an automobile engine. The valve was tested on 170engines and the mean pressure was 6.7 pounds/square inch (psi).Assume the...
- Q University magazine agency wants to determine the bestcombination of two possible magazines to print for the month ofMay. Star which the University has published in the pastwith great success is...
- Q Acountry with 7 seven regions has 7 festivals on February. Assumethe festivals are located randomly, with all possibilities forwhich festival occurred where equally likely. What is theprobability that some region...
- Q Lot Price DataLot Price is lot price in $1000sLot Size is lot size in 1000s of square feetMature Trees is the number of mature trees on thepropertyDistance from Water is...
- Q A sample of 250 observations is selected from a normalpopulation with a population standard deviation of 23. The samplemean is 18Determine the standard error of the mean. (Round youranswer to...
- Q The following data lists age (x, in years) and FICO credit score(y) for 15 random credit card customers. At the 10% significancelevel, use Excel to test the claim that age...
- Q Question 1An article in Technometrics by S. C. Narula and J. F.Wellington (“Prediction, Linear Regression, and a Minimum Sum ofRelative Errors,†Vol. 19, 1977) presents data on the selling price(y)...
- Q 3. A political candidate wants to estimate the mean income inher district. If the standard deviation for incomes is known to be$10,000, how large a sample must she take if...
- Q What is Power ? Define it 2 ways. What are the 2 main uses forpower? Discuss how power is used for planning a research study. Whyis it important to maximize...
- Q 1. A random sample of 28 students at a particular university hada mean age of 22.4 years. If the standard deviation of ages for alluniversity students is known to be...
- Q The frequency distribution below shows the monthly expenditureon gasoline for a sample of 14 individuals.ExpenditureFrequency55 - 59260 - 64365 - 69470 - 74375 - 792#1a). Compute the coefficient of variation.#1b)...
- Q The yearly salary (in thousands of dollars) for a small companyare listed below. Find the mode, mean, median and populationstandard deviation and use the Empirical Rule to find a 95%confidence...
- Q In a sample of 100 Oklahoma public schools, it was found thatOklahoma spends 8,097 dollars per pupil per year, with a standarddeviation of 220 dollars. The population average of threesurrounding...
- Q determine if chocolate milk was as effective as othercarbohydrate replacement drinks, nine male cyclists performed anintense workout followed by a drink and a rest period. At the endof the rest...
- Q 1. Based on her own experiences in court, a prosecutor believesthat some judges provide more severe punishments than other judgesfor people convicted of domestic violence. Five of the most recentdomestic...
- Q oes Cable Video on Demand (VOD D4+) increase add effectiveness?A recent VOD study compared general TV and VOD D4+ audiences afterviewing a brand add. Data were collected on whether the...
- Q The amount of cereal in fifteen boxes of Brand A breakfastcereal were found to have a mean of 14 ounces and a standarddeviation of 0.76 ounces. Construct a 90% confidence...
- Q oes Cable Video on Demand (VOD D4+) increase add effectiveness?A recent VOD study compared general TV and VOD D4+ audiences afterviewing a brand add. Data were collected on whether the...
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