strengths and criticisms of the scientific method in research
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strengths and criticisms of the scientific method in research
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- [Statistics] Use R or RStudio Context of the problem:Fire damage in the United States amounts to billions of dollars, much of it insured. The time taken to arrive at the fire is critical. This raises the question, Should insurance companies lower premiums if the home to be insured is close to a fire station? To help make a decision, a study was undertaken wherein a number of fires were investigated. The distance to the nearest fire station (in miles) and the percentage of fire damage were recorded. Here is the data set: Distance Percent7.5 688.3 666.2 341.6 305.6 706 624.3 478.1 725.7 400.3 531.6 182.5 485.8 535.3 486.3 643.4 526.2 613.2 346.3 656.1 664.6 336.7 760.5 343.2 465.3 555 334.8 466.4 490.2 174.9 476.2 637.6 696.6 542.9 522.1 434.8 358.1 581.2 54.6 464 576.1 400.8 395.9 426.5 626.5 527.5 767.2 676.7 454.1 234 334.8 594…Understanding the Concepts and Skills Explain why the predictor variable is useless as a predictor of the response variable if the slope of the population regression line is 0.Information about how study subjects fit into categories (for example: male/female, blonde/brunette, …) Qualitative data Quantitative data Numerical data Categorical data
- Pseudoscorpions: Investigating the Research Question The data for this project is in data frame Pseudoscorpions, from package abd: require(abd)data(Pseudoscorpions)View(Pseudoscorpions)help(Pseudoscorpions) From the text Analysis of Biological Data, by Michael C. Whitlock and Dolph Schluter: Pseudoscorpions of the species Chordylochernes scorpioides live in tropical forests where they ride on the backs of harlequin beetles to reach rotting figs where they feed. Females of the species are promiscuous and mate with multiple males over short lifetimes. It is unclear what advantages there are for a female to mate multiple times, because the males don't help to care for her young, and mating just once provides all the sperm she needs to fertilize her eggs. One possible advantage is that the sperm of some males is genetically incompatible with a given female and, by mating multiple times, a female increases the chances of mating with at least one male whose sperm is compatible with her. To…Subject : StatesticLinear Regression Problem (See the data table) Please refer to the table on the last page to answer this problem The table displays the average global temperature in degrees celcius relative to the year 2000 in five year intervals. What relationship are you interested in studying? Identify the independent and dependent variables. How many data points were collected? Was sampling conducted? Draw a bubble diagram showing the relationship between the variables, include the effects of a confounding variable on your diagram.
- Required Information [The following information applies to the questions displayed below.] Davis Stores sells clothing in 15 stores located around the southwestern United States. The managers at Davis are considering expanding by opening new stores and are interested in estimating costs in potential new locations. They believe that costs are driven in large part by store volume measured by revenue. During a discussion, one of the managers suggests that number of employees might be better at explaining cost than store revenues. As a result of that suggestion, managers collected the following information from last year's operations (revenues and costs in thousands of dollars): Store 101 182 103 184 105 Req D1 106 107 108 109 110 111 112 113. 114 115 Intercept Employees Costs $5,740 3,565 5,600 4,327 3,689 2,777 2,821 2,318 2,124 3,090 2,329 5,973 5,257 3,220 5,411 Req D2 Employees 51 49 51 35 38 26 35 37 24 29 28 56 53 53 50 Revenues $2,724 5,096 5,183 2,240 5,519 2,846 3,349 6,340 3,646…[STATISTICS] How do you solve this?High School Band - In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Instrument type Band Woodwind Brass Percussion type Concert 31 25 8 Jazz 10 16 10 Marching 65 65 27 To assess whether there is a relationship between band type and instrument type, we conduct an appropriate hypothesis test. Based on the p-value that you calculated in the previous learning check question, which of the following describes the evidence to say that there is a relationship between band type and instrument type? Little evidence Some evidence Strong evidence
- Required information There are a number of techniques to help people stop smoking, but their cost and effectiveness vary widely. One accepted measure of effectiveness of a program is "percentage of enrollees quitting". The table below shows several techniques touted as effective stop-smoking methods, some historical data on the approximate cost of each program per person, and the percentage of people smoke-free 3 months after the program ended. The Cancer Society provides annual cost-offset funding to cancer patients so more people can afford these programs. A large clinic in St. Louis has the capacity to treat each year the number of people shown. If the clinic plans to submit a proposal to the Cancer Society to treat a specified number of people annually, estimate the amount of money the clinic should ask for in its proposal to do the following Technique Acupuncture Subliminal Message Aversion Therapy Out-Patient Clinic In-Patient Clinic Nicotine Replacement TherapyNRT) Cost…Critically examine in detail the relationship between critical value and test value in hypothesis testing.give three different examples one for each in relation to types of test to be conducted.graphically show your answer.Experimental Methods - Question 30 The particular question is related to Lean Six Sigma Black Belt (MindPro) covering Experimental Methods. Please thoroughly understand the relevant image, and accurately confirm whether the mentioned statement is TRUE or FALSE, by, clearly providing a Justification/Working.
