Use to answer question 8&9.A football coach hears that a new exerciseprogram will increase upper-body strengthbetter than lifting weights. He is eager to testthis new program in the off-season with theplayers on his high school team. The coachdecides to let his players choose which of thetwo treatments they will undergo for threeweeks - exercise or weight lifting. At the end ofthree weeks, he will have each player do push-ups to failure (until they can't do any more.) 1. What part of the coach's plan did not followthe rules for a well designed experiment?Explain your answer.2. Describe a way to correct this flaw so thatthe experiment is valid and well designed.

1. Experimental design: One of the assumptions of well-defined experimental design is randomization.…

Answered: A football coach hears that a new…

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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A team of government researchers would like to determine whether a new tax on cigarettes has any effect on people’s smoking behavior. Specifically, they are expecting that by increasing the price of cigarettes, people’s will buy fewer packs of cigarettes (ultimately leading to decreases in cigarette smoking). During the year before the tax was imposed, stores located in rest areas on the state highways reported selling an average of µ = 410 packs per day. The distribution of daily sales was approximately normal. For a random sample of n = 25 days during the first year following the new tax, the researchers found an average of x̅= 380 packs per day for the same stores, with a standard deviation of s = 60. Is the sample mean sufficient to conclude that there was a significant decrease in cigarette purchases after the new tax? Use a one-tailed test with α = .01.
According to the CDC, cholesterol levels can be reduced by following a healthy diet, getting regular exercise, and reducing the amount of alcohol consumed on a weekly basis. One method of monitoring overall cholesterol levels is to calculate your cholesterol ratio (LDL/HDL), in general a cholesterol ratio between 3.5 and 5.0 is considered to be healthy for most adults. Suppose you are a clinical researcher testing the effects of these lifestyle changes on patient cholesterol levels. In order to determine if following these guidelines helps to reduce overall cholesterol, a total of 18 participants (N = 18) with moderate to high cholesterol ratios (i.e., 3.91 to > 5.0) were recruited for a healthy lifestyle study and their cholesterol ratio was calculated three times over a six week period: Week 0 (baseline), Week 3, and Week 6. Using the variables "Week 0", "Week 3", and "Week 6" in the data set, conduct a One-Way, Within Subjects (AKA Repeated Measures) ANOVA, at α = 0.05, to see…
According to the CDC, cholesterol levels can be reduced by following a healthy diet, getting regular exercise, and reducing the amount of alcohol consumed on a weekly basis. One method of monitoring overall cholesterol levels is to calculate your cholesterol ratio (LDL/HDL), in general a cholesterol ratio between 3.5 and 5.0 is considered to be healthy for most adults. Suppose you are a clinical researcher testing the effects of these lifestyle changes on patient cholesterol levels. In order to determine if following these guidelines helps to reduce overall cholesterol, a total of 18 participants (N = 18) with moderate to high cholesterol ratios (i.e., 3.91 to > 5.0) were recruited for a healthy lifestyle study and their cholesterol ratio was calculated three times over a six week period: Week 0 (baseline), Week 3, and Week 6. Using the variables "Week 0", "Week 3", and "Week 6" in the data set, conduct a One-Way, Within Subjects (AKA Repeated Measures) ANOVA, at α = 0.05, to see…
In the table below is a column of masses for various individuals. 20 Kg (kllograms), for instance, is a typical mass for a young child while 80 kg Is characteristic of an adult's mass, If you were to travel to the Moon, your weight would change but your mass would remain the same. Roughly speaking, mass is a measure of the amount of "stuff" you're made of (matter). In the United States we commonly measure weight using the English pound. Another common unit for measuring weight is the Newton. The second column in the table shows the corresponding weight, in Newtons, for each individual. These are the weights on Earth. Plot each pair of numbers as an ordered pair on the graph. Use the vertical ("y") axis for the weights and the horizontal ("x") axis for mass. Label your axes. Draw a best fit line through the points and measure the slope of this line. On your plot, mark and circle the points you use to determine the slope. The slope gives you the "weight per unit mass" here on Earth. In…
In addition to therapy, anti-depressant drugs are used in the treatment of depression. The data below are from a study comparing two anti-depressant drugs. A baseline measurement for symptomatic behavior for depression is taken. After treatment with medication, another measurement taken. The data given in the table is for improvement which is for the reduction in symptomatic behavior.
The US Department of Agriculture collected nutrient data on various types of cheeses. Two nutrients of concern to people trying to eat healthier are saturated fat and sodium. The given JMP applet shows scatterplots of the amount of sodium in milligrams by the amount of saturated fat in grams for these cheeses.t O JMP Applet jmp ? Sodium (mg) By Saturated Fat (g) Sodium (mg) By Saturated Fat (15 g - 21 g) 2000 2000 1500- 1500 1000- 1000- 500- 500- 0- 0- 20 15 16 20 21 Saturated Fat (g) Saturated Fat (g) Sodium (1,000 mg - 2,000 mg) By Saturated Fat (g) 1800- 1000- 1400- 1200- 1000- 10 15 20 Saturated Fat (g) II (Bu) unipos III (Bu) unipos (Bu) unipos
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Early life corresponds to the first bacterial colonization of the digestive tract, creating a microbiome thought to play an important role in human development. What might be the effect of early exposure to antibiotics on children's development? One study followed 11,532 full-term babies all born in the county of Avon, United Kingdom, during 1991 and 1992. Exposures to antibiotics during infancy were recorded, along with measures of body mass at regular intervals over several years. The researchers found that antibiotic exposure during the first six months of life was associated with increased body mass later in childhood.
Ten years ago, the town of Easton decided to increase its annual spending on education so that its high school graduates would be able to earn higher wages. Now Easton has asked you to evaluate the effectiveness of the spending increase. Their data show that before the spending increase, the average annual salary of recent high school graduates was $25,000 and that now that average salary has risen to $28,500. Fortunately for your analysis, a neighboring community (Allentown) did not change its annual spending on education. Ten years ago, recent Allentown high school graduates earned an average of $22,500, and now that average is $23,750. (a) Use a difference-in-differences estimator to determine whether Easton’s spending increase caused the wages of their high school graduates to increase. please provide an accurate answer.
You are working on a magic pill that you think might totally eliminate pain when given to patients who are experiencing severe pain. In your work, you have discovered three ingredients that might be effective if each is used alone. Which drug therapy works best? The dependent measure is the degree of pain relief after 30 minutes of ingestion. A higher value means greater pain relief. Drug 1: 5,7,11,10,10,6,4,8 Drug 2: 13,12,12,8,7,8,12,11 Drug 3: 15,11,13,10,10,16,14,11 Placebo: 10,8,5,9,6,13,11,16 Set up your hypotheses, Report your Hypotheses in narrative and symbolic form. Use a = .01 What is the Dependent Variable? What is the Independent Variable? How many levels exist for the independent variable? Perform the appropriate ANOVA. Present your results in an ANOVA Summary Table Complete the Scheffe' Test if you find a Significant F . Compute the R2 If necessary

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A football coach hears that a new exercise program will increase upper-body strength better than lifting weights. He is eager to test