Before you begin you will need to consider the possible causes of death and design an experiment for each possibility that includes alternative hypotheses, the test, and predictions. Complete the flow chart below. The Experimental Question... What may have been the cause of death? Hypothesis 1 Hypothesis 2 If...
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- Please answer part d, e, f, and g In a certain jurisdiction, all students in Grade Three are required to take a standardized test to evaluate their math comprehension skills.The attached contains these data resulting from a random sample of n=40 schools within this jurisdiction. From these data you wish to estimate the model Yi=β0+β1Xi+ei where Xi is the percentage of Grade Three students in School i who live below the poverty line and Yi is the average mathematics comprehension score for all Grade Three students in the same school, School i. The observed data for the X variable is labled perbelowpoverty and the obvserved data for the Y variable is labeled mathscore in the .csv file.Import (either hand type or load the file) data into R Studio, then answer the following questions based on the data.(a) Create a scatterplot of the data. What can you say about the nature of the relationship between the percentage of Grade Three students living below the poverty line in a certain school…Hand written please. An investigator wants to assess the association between manganese and blood pressure in pregnant women (side note: this is a study I am currently working on). The study plans to enroll 100 pregnant women. During the third trimester, each participant will have their manganese level and systolic blood pressure measured. Identify the type of study design and briefly describe its strengths and weaknesses.Use Excel to determine whether the variables mentioned in the two problems below are independent or not. Clearly state the 4 steps in Hypothesis Testing as discussed: Step 1: The hypotheses are written in words. Step 2: Find the alpha in the problem Step 3: Make a screenshot of the Excel calculations are results as shown in the video. Step 4: Make a decision based on the value found in Step 3 and make a conclusion. 2. The side effects of a new drug are being tested against a placebo. A simple random sample of 565 patients yields the results below. At a significance level of α = 0.05, is there enough evidence to conclude that the treatment is independent of the side effect of nausea? Result Drug Placebo TOTAL Nausea 36 13 49 No nausea 254 262 516 TOTAL 290 275 565
- The amt of pollution in waterways…Hi. I've been trying to figure out my public health stats homework for a few hours and decided to try to get some help here. I've written down the homework questions and provided the data needed from the table. I can't seem to figure out what is being asked of me. Thanks for any help. QUESTIONS: Use the information in table 5 to answer the following questions. A. Suppose moms of both children with asthma and moms who have children without asthma misreported infant supplementation of cod liver oil. Twenty five percent of the moms that reported no cod liver oil supplementation actually sometimes gave their infants cod liver oil. 1. Create the corrected 2X3 table (show your work). 2. Recalculate all of the incidence proportions. 3. Recalculate the relative risks. 4. Did the misclassification under- or over- estimate the effect of cod liver oil on the development of asthma reported in the manuscript? 5. Is this an example of non-differential or differential misclassification? Why? B.…The average time in years to get an undergraduate degree in statistics was compared for meals and females. Random sample of 200 male statistics majors and 200 female statistics majors were taken. Choose the appropriate parameter(s) for this situation. [Hint: The parameter(s) to be used in your hypothesis]. O A. P1-P2 O B. H1-H2 O C. None of these O D. p O E. u
- Now consider the hypothesis below: Hypothesis: The cookies are burning because an angry ghost haunts the oven At face value, this doesn't appear to be a particularly scientific explanation for the phenomenon of burnt cookies - but why? Which of the three criteria for a quality scientific hypothesis does this statement violate? . Question: Which of the following criteria are not met by the statement on this page? 1. It is not a question; rather, it is an explanation for an observed phenomenon 2. It should be possible to test the hypothesis, and make predictions of what will be observed if the hypothesis is supported 3. The hypothesis must be falsifiable - it should also be possible to predict what will be observed if the hypothesis is not supported 1 O 3 O 2 & 3 02 O 100 F 1 B R W 7:Fargo 7:33 PM Thu Feb 8 U tab caps Lumen OHM The following is a table of probabilties calculated from a survey of BHCC students with the question asked "How many classes are you taking this semester?" Using t x: # of classes 1 2 3 4 5 P(x) 0.17 0.28 0.11 0.34 0.1 fohm.lumenlearning.com a.) What is the probability that a student is taking 2 or more classes? 0.83 7:33pm Thursday, February 8 b.) What is the probability that a student is taking at least 3 classes? 0.55✓ + find following abilities for a student selected at random: c.) What is the probability that a student is taking more than 3 classes? 0.44 ✓ ! d.) What is the probability that a student is taking less than 2 classes? 0.17 1 e.) What is the probability that a student is taking no more than 2 clases? 0.45 Q f.) What is the average (mean) amount of classes a student takes at BHCC? 2.92 g.) What is the standard deviation for the amount of classes a student takes at BHCC? (round to two decimal places) Question Help: Message…Please find the critical values, the T value, the P value, and determine if you should reject or fail to reject the hypothesis and why.
- Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.12 milligrams per liter (mg/L). A random sample of 10 precipitation dates in 2007 results in the following data table. Complete parts (a) through (c) below. Click the icon to view the data table. - Data table (a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990. Ho: P = 0.12 mg/L H₁: μ # 0.12 mg/L 0.074 0.075 0.071 0.257 0.116 0.177 0.107 0.247 0.333 0.102 (b) Construct a 90% confidence interval about the sample mean concentration of calcium precipitation. The lower bound is The upper bound is Print (Round to four decimal places as needed.) Done XBelow you will find a table that include different research scenarios. Your task is to first identify the proposed analysis and why you chose that analysis for each of these scenarios, then proceed to respond to the other sections related to each scenario. All of your written responses should be recorded in the three tables provided below. Please use α = .05 for all analyses. If an assumption is not met, please continue with the analysis for the purpose of this assignment. Scenario: Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age 25. Information on the age of n = 50 people who recently received speeding tickets was sourced by researchers who are interested in whether the age distribution for the sample of drivers who recently received speeding tickets is different from the age distribution for the population of licensed drivers. Data Driver sample n = 50 where 17 students are 25 years of age or younger and 33 are above 25 years…PART I: For this part, we will divide the data set into two groups: those who have infection and those who do not. Consider only those who have an infection.1. For these subjects only, construct a stemplot for the variable “heart rate”. (We will be making this into a back-to-back stemplot later, so leave room on the left side.)2. Discuss the shape of your stemplot. Is it symmetric? Positively skewed? Negatively skewed? None of these? Are there any outliers?3. How would you describe the center and the spread of this distribution?4. Find the five-number summary.5. Construct a box plot.