An athletic director proudly states that he has used the average GPAs of the university's sports teams and is predicting a high graduation rate for the teams. Why is this method unsafe?
Q: Dairy cattle are cattle that are bred for their ability to produce large quantities of milk.…
A: we need to input the provided data into a dataset. Let's assume the dataset is named "CattleData"…
Q: An advertising agency is testing the effectiveness of a new commercial. They are trying out the…
A: factor : time length and format time length level = 3(15,30,60 seconds) Format level =2(animated vs.…
Q: A basketball team is down by 2 points with only a few seconds remaining in the game. There is a 50%…
A: In statistics, chance shows how likely something will happen.
Q: International public health practitioners have continuously attempted to point out differences in…
A: a) The test statistic = 0.403 = 60 At 0.05 significance level, the critical value is t0.05 =…
Q: t quit working either because they have virus A or computer virus B. Jenn estimates that about 20%…
A: Define the following events: A: Computer is infected by virus A B: Computer is infected by virus B…
Q: You are the manager for a family medicine clinic that has 3 physicians. The staff have come to you…
A: In order to determine whether there is significant difference in between the mean number of patients…
Q: Dr. S. Oberman has the research hypothesis that drivers who have consumed one drink are actually…
A: The test statistic is z=x¯-μ0σn z=78-752464=33=1
Q: Dr. S. Oberman has the research hypothesis that drivers who have consumed one drink are actually…
A: The standard error can be calculated as: SE=sn Here, s= Standard deviation n = Sample size…
Q: David Anderson has been working as a lecturer at Michigan State University for the last three years.…
A: Introduction: Denote μ1, μ2 as the true mean scores of students in the first and second sections,…
Q: A researcher is studying two types of medication that both treat hives. 24 out of the random sample…
A: Find the probability that people given medication A and B still have hives using the formula: Let…
Q: It describes a scenario in which a math teacher named Matt allows his students to use a 1-page…
A: Ans: Please read comments in the code for better understanding. import java.io.File; // Import the…
Q: You work at an alcohol and substance abuse center and run a youth program. You want to determine…
A: ANOVA: In one factor ANOVA model only one factor is studied, that is only the effect on one factor…
Q: MUST USE SPSS PLEASE! A researcher wants to examine the relationship between a freshman’s…
A: The data on freshman’s motivation and GPA is given…
Q: A clinician interested in agoraphobia (fear of public places) tests a new treatment method. She…
A: Given Information : A clinician interested in agoraphobia (fear of public places) tests a new…
Q: Speed is measured in miles per hour above or below the 60-mph speed limit, with 1 mph being the…
A: For certain study, speed is measured in miles per hour above or below the 60-mph speed limit, with 1…
Q: A researcher has participants expecting to receive either painful or mild electrical shocks during a…
A: Usually in survival analysis studies we can use both parametric and non-parametric statistics. For…
Q: With the pandemic, cleaning and sanitation products have become increasingly more popular. Pfizer is…
A: Given that, X1 bar= 5.7, n= 20 And s1= 0.65 X2 bar= 6.2 standard deviation, s2= 1.3 Hypothesis:…
Q: Research suggests that spending time with animals can reduce blood pressure. I want to know whether…
A: F distribution
Q: An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the…
A:
Q: LeRoy, a starting player for a major college basketball team, made only 40% of his free throws last…
A: From the provided information, Sample size (n) = 40 From which LeRoy made 25 free throws. Sample…
Q: a drug company claims that 42% of patience with headaches are cured by they medicine. However a lab…
A:
Q: You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to…
A: (a) Denote μ as the true percentage of people experiencing nausea, among those who have flu and are…
Q: u- 36 H-20 u+ 20 4+30 -- - - -- -3 Z score 15. Based on a 5% level of significance (see standard…
A: Given Information: Level of significanceα=0.05.
Q: Scientists at a pharmaceutical company want to compare their new drug to an existing one. Let's call…
A: From the given information, the claim of the problem is ‘new drug reduces severe side effects in…
Q: A researcher is studying two types of medication that both treat hives. 15 out of the random sample…
A: Null and alternative hypothesis: Correct answer is option (3) The sample proportions are,
Q: In Nigeria, with the monsoon, there was a drastic increase in cases of Malaria. Peniguillin is a…
A: Given, Proportion of nausea treated with peniquillin Proportion of nausea treated with placebo The…
Q: Question 4 A family software company operating in 4 cities in the UK would like to automate customer…
A: Let the random variable X denotes the number of complaints received when being served by a virtual…
Q: You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to…
A: Given Information: Claim: The percentage of those who experience nausea while having the flu and…
Q: When evaluating the effectiveness of a newly invented psychological treatment to people having…
A: The effectiveness of the new psychological treatment is to be evaluated. The AB design measures the…
Q: Amit Almor, a psychology researcher at the University of South Carolina, conducted a series of…
A: ANOVA table is: Source of variation SS df MS F Between treatments 3095.00 2…
Q: Burning fuels in power plants and motor vehicles emits carbon dioxide (CO2), which contributes to…
A: Given data : Country CO2 Emissions (Metric tons per capita) Aruba 32.92 Andorra 5.97…
Q: ou are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to…
A: give data p = proportion of people taking tamiflu and experience nausea claim : p >0.30 α =…
Q: A clinician interested in agoraphobia (fear of public places) tests a new treatment method. She…
A: Given information, Sample size n=5 The following table summarizes the data given: Subject n Trips…
Q: A researcher is studying two types of medication that both treat hives. 18 out of the random sample…
A: Given data: Significance level = 0.05 Claim: Test to see if the proportion of people who still had…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A researcher is studying two types of medication that both treat hives. 18 out of the random sample of 201 adults given medication A still had hives 30 minutes after taking the medication. 22 out of another random sample of 212 adults given medication B still had hives 30 minutes after taking the medication. Test to see if the proportion of people who still had hives after medicine A is less than the proportion of people who still had hives after medicine B. Use a 0.05 level of significance. The correct hypotheses are: O Ho: PA HA PA Ho: PA HA PA O Ho: PA HA PA = PB PB(claim) The p-value is: PB PB(claim) PB PB(claim) Since the level of significance is 0.05 the critical value is -1.645 (round to 3 places) The test statistic is: (round to 3 places)Dr. S. Oberman has the research hypothesis that drivers who have consumed one drink are actually slightly better (score higher on a driving test) than drivers who have had no alcohol. (One drink, she believes, makes them relaxed and not as nervous.) She tests this by having subjects take a standard driving test. We know that completely sober, college-student drivers score an average of 75 on this test, where high scores mean better driving. Dr. S. Oberman's null hypothesis is: [note: Ho means mu, the population mean according to the null hypothesis] Ho is equal to 0 Po is less than 0 Po is not known, nor can it be known Ho is equal to (or less than) 75 Po is greater than 75We want to know if students with bronchitis at 5 years have more cough symptoms when they grow up. Out of 290 children with Bronchitis at Age 5, 32 of them has cough symptoms at Age 12. Out of 970 children with no Bronchitis at Age 5, 43 of them has cough symptoms at Age 12. Is the cough symptom equally prevalent in both populations?
- Two of the hottest smartphones on the market are the newly released iPhone6 and the Samsung Galaxy S6. CNet.com offers online reviews of all major cell phones, including battery life tests. In a review of the iPhone6, the talk-time battery life of 35 iPhones was measured. Similarly, the talk-time battery life of 30 Galaxy S6s was measured. Two outputs are given below. Which is appropriate for analyzing the data collected? Output 1 Output 2 Using the StatCrunch output chosen above, determine if there is a difference in the mean battery life for the two phones. Use a significance level of 0.01 when conducting the test. Select the appropriate hypotheses. Make sure the notation used in the hypotheses agrees with the type of samples selected in the output. Ho:μd=0Ho:μd=0Ha:μd<0Ha:μd<0 Ho:μd=0Ho:μd=0Ha:μd≠0Ha:μd≠0 Ho:μd=0Ho:μd=0Ha:μd>0Ha:μd>0 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1>μ2Ha:μ1>μ2 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1≠μ2Ha:μ1≠μ2 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1<μ2Ha:μ1<μ2 αα =…Tuff Rubbers, a tire manufacturer, knows that 5% of the tires it produces are defective. To reduce the number of defective tires that make it to market, the manufacturer uses a special device to test each tire before shipping it out. The test will correctly detect a defective tire 97% of the time. However, the test will incorrectly indicate a good quality tire is defective 6% of the time. If the test indicates a tire is defective, the tire is recycled. Otherwise, the tire makes it to market. Let D represent the event a tire is defective, and T represent the event the test indicates a tire is defective. In each part of this question, express each probability only in terms of the events D and T and justify any computation by explicitly stating the formula you are using. (a) Express each of the three probabilities listed above in terms of the events D and T. (b) What percentage of tires are recycled? (c) What percentage of recycled tires are not defective? (d) What percentage of…A group of educators want to determine how effective tutoring is in raising students' grades in a math class, so they arrange free tutoring for those who want it. Then they compare final exam grades for the group that took advantage of the tutoring and the group that did not. Suppose the group participating in the tutoring tended to receive higher grades on the exam. Does that show that the tutoring worked? If not, explain why not and suggest a confounding variable. Question content area bottom Part 1 Choose the correct answer below. A. Because this was an observational study, it only shows an association; it does not show that the tutoring worked. It could be that an insufficient number of students were studied to show that the tutoring worked. B. The study shows that the tutoring worked. C. Because this was an observational study, it only shows an association; it does not show that the tutoring worked. It could be that more motivated…
- An apartment management company wants to explore the consequences of allowing residents to have multiple dogs. They would like to find out whether the number of dogs predicts resident ratings. They would also like to control for the year the apartment complex was built because thaty might also affect the resident rating. They have collected data on several of their existing complexes. For each complex, they have counted the number of dogs currently living in the complex, the year the complex was built, and the average rating for that particular complex. They would like to perform a multiple regression on these variables to predict resident ratings. See data below. These data are the same as the previous question. Multiple Dog Consequences Number of dogs Year of facility Rating (out of 5) 54 1975 2 31 1964 3.5 0 2015 4.8 11 2011 3.8 73 1964 2.3 23 2016 3.7 0 2015 4.7 49 1989 2.7 What is the b coefficient for Number of Dogs? Round to 3 decimal places.The ANOVA from a randomized complete block experiment output is shown below. Source DF SS MS F P Treatment 4 1010.56 ? 29.84 ? Block ? ? 64.765 ? ? Error 20 169.33 ? Total 29 1503.71 (a) Fill in the blanks. You may give bounds on the P-value (b) How many blocks were used in this experiment? (c) What conclusions can you draw?What are the strengths and the weaknesses of experimental designs?
- A national study found that treating people appropriately for high blood pressure reduced their overall mortality by 20%. Treating people adequately for hypertension has been diffcult because it is estimated that 50% of hypertensives do not know they have high blood pressure, 50% of those who do know are inadequately treated by their physicians, and 50% who are appropriately treated fail to follow this treatment by taking the right number of pills. Answer the following questions ( please answer all the parts 1,2 and 3): 1) What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?2) What is the probability that at least 7 of the 10 hypertensives know they have high blood pressure? 3) If the preceding 50% rates were each reduced to 40% by a massive education program, then what effect would this change have on the overall mortality rate among true hypertensives; that is, would the mortality rate decrease…A serious side effect of allergy medicines is that they cause drowsiness, which can cause many problems for the individuals taking them. In recent years, a new non-drowsy allergy medicine has been developed. The company that created the medicine claims to be the first, once-a-day, non-drowsy allergy medicine (call it Medicine A). An independent research group wanted to check on this claim by comparing Medicine A with another allergy medicine not advertised as non-drowsy (call it Medicine B). A random sample of 3,193 allergy sufferers was selected and each individual was randomly assigned to take either Medicine A or Medicine B. From the Medicine A group, 114 of 1,604 reported drowsiness and from the Medicine B group, 155 of 1,589 reported drowsiness. a) Calculate and label the two sample proportions separately. Next, calculate the difference between these sample proportions by subtracting (Medicine A – Medicine B). Complete these calculations by hand, label each of them, and present…The bacterium Staphylococcus aureus is commonly found on the skin and rarely causes major problems. If it gets under the skin or into the lungs it can cause boils or pneumonia. If the strain of bacterium causing these problems is resistant to methicillin, the infections can be life threatening. Methicillin resistant Staphy- lococcus aureus or MRSA is, therefore, a major concern in hospitals and clinics. Given the death rate from MRSA lung infections is 20%, if 20 patients are admitted in the hospital find the following probabilities: (a) Less than 3 die (b) At least 3 die. (c) Between 6 and 3 die.