Statistics question and answers for August 18, 2023
- Q Suppose a sample of​ O-rings was obtained and the wallthickness​ (in inches) of each was recorded. Use a normalprobability plot to assess whether the sample data could have comefrom a...
- Q Visit the NASDAQ historical prices weblink. First, set the daterange to be for exactly 1 year ending on the Monday that thiscourse started. For example, if the current term started...
- Q R code:## 2. __Basic dplyr exercises__## Install the package `fueleconomy` and load the dataset`vehicles`. Answer the following questions.install.packages(\"fueleconomy\")library(fueleconomy)library(dplyr)library(tidyr)data(vehicles)e. Finally, for the years 1994, 1999, 2004, 2009, and 2014, findthe average...
- Q A random sample of 16 undergraduate students receiving studentloans was​obtained, and the amounts of their loans for the schoolyear were recorded. Use a normal probability plot to assess whetherthe sample...
- Q Consider data regarding a response y and an explanatory variablex, both numericxy12.80.722.61.336.8-1.143.00.254.71.165.0-0.175.00.982.91.097.0-0.2103.70.8The null hypothesis that the expected value of the response isconstant for all values of the explanatory variable is:Select...
- Q 29; 37; 38; 40; 58; 67; 68; 69; 76; 86; 87; 95; 96; 96; 99; 106;112; 127; 145; 150What is the Standard deviation (please round to two decimalplaces)?
- Q Use the following pairs of observations to construct an​ 80% anda​ 98% confidence interval for  β1.x11553300442266y11664422333377The​ 80% confidence interval is (______) ​(Round to two decimalplaces as​ needed.)The​ 98% confidence interval is...
- Q Qualitative versus Quantitative. Determinewhether the following variables are qualitative orquantitative.The birth months of individualsThe responses of customers at a restaurant on a scale from 0 =terrible to 5 = fantasticThe...
- Q Action AdventuresThe Adventure Toys Company manufactures a popular line of actionfigures and distributes them to toy stores at the wholesale priceof $10 per unit. Demand for the action figures is...
- Q You flip the same coin 900 mores times (1000 total flips). Ifhalf of the 900 additional flips are heads and half are tails, whatis the empirical probability of getting a...
- Q In a survey of 100 U.S. residents with a high school diploma astheir highest educational degree (Group 1) had an average yearlyincome was $35,621. Another 120 U.S. residents with a...
- Q Suppose that a company's equity is currently selling for $26.00per share and that there are 5.60 million shares outstanding. Ifthe firm also has 46 thousand bonds outstanding, which are sellingat...
- Q At a used dealership, let X be an independent variablerepresenting the age in years of a motorcycle and Y be thedependent variable representing the selling price of usedmotorcycle. The data...
- Q (A review on SAS data management)The following is a data set of 12 individuals. And we want torelate the heart rate at rest (Y) to kilograms body weight (X).90 6287...
- Q Consider a student who is rather irregular about classattendance. If she attends class one day, the probability is .8that she will attend class the next day. And if she misses...
- Q The number of syntax errors in a programming assignment for 20randomly selected students are as follows:21, 5, 44, 44, 22, 49, 2, 48, 17, 27, 21, 34, 24, 12, 43,...
- Q The time that takes to complete a certain type of constructionprojects has a mean of 35.5 months and a standard deviation of 1.5months.a. According to the Tchebysheff’s theorem, at least...
- Q GTB, Inc., has a 20 percent tax rate and has $85,656,000 inassets, currently financed entirely with equity. Equity is worth $6per share, and book value of equity is equal to...
- Q A college dean is interested in the exam performance of studentsin a biology course. After the final exam, students are randomlyselected from three different section of the biology course. Whatcan...
- Q 3. A distinguishing characteristic of entrepreneurs is theirwillingness to take risks. R.H.Brockhaus (Academy of ManagementJournal, Sept. 1980) used a choice dilemma questionaire (CDQ) tomeasure the risk-taking propensities of successful entrepreneurs(lower...
- Q Please explain your answers and use Excel to show theexcel formula you used to get your solution.6. A manufacturing process produces connecting rodswhose diameter is normally distributed with mean 1.495...
- Q Please assist in developing questions on Ageism for aquantitative research design using the Likert Scale.
- Q Explain why one would use non-parametric tests? What are theiradvantages and disadvantages? At least a 100 word explanation
- Q The mean incubation time for a type of fertilized egg kept at acertain temperature is 17 days. Suppose that the incubation timesare approximately normally distributed with a standard deviation of1...
- Q Twenty economist were chosen randomly, and asked to predict ifthe national economy would improve during the next 12 months.Eleven of the economists predicted an improvement, and nineeconomists predicted a decrease...
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