*****15. Does Stay Bright nail polish remain on fingernails longer than Acme nail polish? You design an experiment find out. A random sample of people was selected to wear both nail polishes. Which hand receivedwhich polish was determined randomly. After one week, the difference in the quality of the nail polish of each subject is evaluated. What type of experimental design is this?This is a completely randomized design with two factors.This is a completely randomized design with one factor.This is a nonrandomized design.This is an observational study.This is a matched pairs design.

Stay Bright nail polish remains on fingernails longer than Acme nail polishA random sample of people…

Answered: pes Stay Bright nail polish remain on…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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It is difficult to conduct sample surveys on sensitive issues because many people will not answer questions if the answers might embarrass them. Randomized response is an effective way to guarantee anonymity while collecting information on topics such as student cheating or sexual behavior. Here is the idea. To ask a sample of students whether they have plagiarized a term paper while in college, have each student toss a coin in private. If the coin lands heads and they have not plagiarized, they are to answer "No." Otherwise they are to give "Yes" as their answer. Only the student knows whether the answer reflects the truth or just the coin toss, but the researchers can use a proper random sample with follow-up for nonresponse and other good sampling practices. Suppose that in fact the probability is 0.4 that a randomly chosen student has plagiarized a paper. Draw a tree diagram in which the first stage is tossing the coin and the second is the truth about plagiarism. The outcome at…
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Determine if the samples are independent or related. Two formulations of a new whitening soap are compared to their whitening effect. A random sample of 40 potential users of the soap is selected. Each person uses a randomization mechanism to determine which formulation is applied on the left arm so that the other formulation is applied on the right arm. After two weeks, they measured the effect of each formulation.
2. In a population it is estimated that 20% have a desired trait of interest for the researcher. The researcher wants to know how many people on average he has to draw from a population to get 2 people with the trait. Use rows 20-24 of the Random Number Table to carry out the simulation. Explain clearly how you set up the problem and report your findings. Answer:
Many people like to play app based games on their mobile devices. Suppose we would like to estimate the average amount of time (in hours) per week students have played an app-based game on their mobile device at CSU Stan. In order to do this, we take a random sample of 20 students and ask them how many hours they have played an app- based game in the last week. The following data were collected: 11 4 5.5 5.5 7 6.2 10 10 7.5 6 7 7.5 2.5 Which of the following is the correct 99% confidence interval for the estimate of the average number of hours (per week) that all CSU Stan students have played an app- based game? [5.28, 7.59] [4.86, 8.01] [5.48,7.39] [5.86, 7.01]
Hospital floors: Hospital floors are usually bare tiles instead of carpet. Carpets will decrease noise but might increase germ growth. To study this, researchers installed carpet in 8 of 16 hospital rooms. They randomly selected the rooms to carpet. The other rooms had bare tiles. After two weeks of normal use, they collected air samples from the rooms and counted the bacteria in each sample. Based on this description of the experiment, which of the following is a part of the experiment design? Check all that apply. Group of answer choices
Question #10 Please explain The three principles of designing experiments are to control, randomize, and replicate. Which of the following statements is not true about these important principles? Considering (controlling) more variables in planning an experiment helps ensure each study group is similar to the other study groups. Using a control group with a placebo is important since otherwise folks in the control group may behave differently than those in the treatment group. Randomizing individuals into groups is one component to prevent accidental bias from creeping into a study. We can always generalize the result of a study to the greater population so long as we randomize which patients go into which study groups. Studying many cases (e.g. including many patients in a study) is often more helpful than just including a few cases in the study. If we collect more information on each case (e.g. take repeated measurements on each individual) that might be helpful to obtaining more…
ents S arning toring 2 W S X Show all Work neatly on paper. At the top of the page, write the date and the name this assessment. Clearly number each problem. Box all answers. Save all work in a binder until the end of the course. below. The height (in inches) and weight (in pounds) of 21 randomly selected baseball players are in the le # a) State the variables. Explanatory: x Response: y = = Select an answer b) Make a scatterplot of a versus y in StatCrunch. Which of the following is the correct graph? 3 E D C $ 4 = Select an answer R x, height (in inches) 76 78 73 72 78 72 74 73 72 76 76 75 71 72 74 75 70 71 74 75 74 F V % 5 T G 6 y, weight (in pounds) 224 235 210 180 240 180 210 190 208 212 185 210 186 180 200 180 185 200 228 220 200 B of Select an answer of Select an answer MacBook Pro Y H & 18 7 N U * 00 8 J 1 ( 9 K 0 0 L - P
A dowser has correctly located water for a well 1 out of 2 times in Jones County. In Jones County, someone who is just guessing has a 40% chance of locating water for a well. Does this sample provide sufficient evidence that the dowser can locate water and is not just guessing?
is described below. NOTE: If the method is experimental, indicate if it is a true experiment or quasi experiment. 1. I get 30 people and use random assignment to divide the people into two groups. One group reads an article about the statistics of injuries and deaths caused by people using smart phones while driving, the other group watches a short video about a person who killed someone while using their smart phone. Both groups are then monitored to see if either of these made a difference in how often these people use their smart phones use while behind the wheel. What method would that study be? 2. What method asks a series of questions that are all planned in advance?
What is the Sample?
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