Calculate the X² statistic, degree of freedom and critical value. A market researcher conducted a study to see if different age groups prefer different news sources. Hesurveyed 80 people in the 25-49 age group and 80 people in the 50+ age group and asked them if theyprefer to get their news from TV, online, radio, or printed newspapers. The data are listed in the tablebelow. Conduct a Chi-Square test for Independence with a.01.News sourceGroup 18-49Group 50+TV30201515OnlineRadioPrinted papers2040155Total count50603020

A market researcher has surveyed to see if the different age groups prefer different news sources.He…

Answered: A market researcher conducted a study…

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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Please submit the answer via a PDF document or Word document. **Independent t-test** Use the following data and scenario to answer the questions. You want to know if someone's exercise status (those who exercise and those who do not exercise) significantly influences energy level. You obtain different participants and put 30 in the "exercise" group and another 30 in the "non-exercise" group. Those in the "exercise" group exercised one hour per day for 2 weeks. Those in the "non-exercise" group refrained from exercising. (In SPSS, code exercise as 1 and non-exercise as 2). After the two weeks you obtained their energy level via a quantitative scale. You hypothesize that exercise status will significantly influence energy level. Use the following data to answer the following questions: 1. Is the study significant? 2. Is p <.05 or p>.05? 3. Do you reject or retain the null hypothesis? 4. What can you conclude about the hypothesis for this study? 5. What is the statistical sentence?…
Answer the questions with clear explanations
DiabetesA group of 10-year-old boys were first ascertained in acamp for diabetic boys. They had their weight measuredat baseline and again when they returned to camp 1 yearlater. Each time, a serum sample was obtained from whicha determination of hemoglobin A1c (HgbA1c) was made.HgbA1c (also called glycosylated hemoglobin) is routinelyused to monitor compliance with taking insulin injections.Usually, the poorer the compliance, the higher the HgbA1clevel will be. The hypothesis is that the level HgbA1c isrelated to weight. The data in Table 11.28 were obtained.11.92 What test can be performed to assess the relationship between weight and HgbA1c at the initial visit?11.93 Please perform the test in Problem 11.92, and reporta two-tailed p-value.11.94 Do the results in Problem 11.93 imply a relationshipbetween change in HgbA1c and change in weight for anindividual boy? Why or why not?11.95 Compute a rank correlation between change inweight and change in HgbA1c, each over 1 year. Use this…
A total of 150 participants are selected for a study of risk factors for cardiovascular disease. At baseline (study start), 24 are classified as hypertensive. At onc year, an additional 12 have developed hypertension and at 2 years another 8 have developed hypertension. What is the prevalence of hypertension at 2 years in the study?
The human body is a complex, highly organized structure of cells that work together to accomplish the specific functions necessary for sustaining life. Each human has individual characteristics that uniquely define who they are, but there are characteristics about the human body that have much less variability. One of these is the measurement around the calf muscle's widest part. For this dataset, N = 507 individuals in their twenties and thirties who exercised several hours each week measured around the widest part of both calf muscles and the average maximum girth in centimeters was recorded. We will use this data to get better acquainted with the Empirical Rule. Empirical Rule 68% of data 95% of data 99.7% of data -30 -20 -1o +1o 20 +30 For data that can be reasonably assumed to follow a normal distribution with mean u and standard deviation a, the Empirical Rule can be used to get a sense of where the data values are located in the distribution with regards to the mean. Refer to…
Whats the critical value?
What is the Tukey’s test critical value?
The best depiction of a population characteristic is a(an): Dependent variable Statistic Independent variable Parameter
Employee’s human capital is measured in terms of his/her age, education, tenure, and rank. Number of years an employee worked in the same organization measures the amount of firm-specific human capital that employee possesses. Data of 413 employees’ tenure was analyzed to predict interim leadership role importance in a study reported in Journal of Advanced Management Research (Vol. 9, 2012). The following table shows the data of these employees tenure in the organization: Tenure (in years) 0-1 1-6 6-11 11-20 20-21 No. of employees 48 109 58 75 123 Calculate mean tenure of these 413 employees.
Please let me know if I calculated relative risk correctly. Thank you for your assistance.
PLE collects a variety of data from special studies, many of which are related to the quality of its products. The company collects data about functional test performance of its mowers after assembly; results from the past 30 days are given in the worksheet Mower Test. In addition, many in-process measurements are taken to ensure that manufacturing processes remain in control and can produce according to design specifications. The worksheet Blade Weight shows 350 measurements of blade weights taken from the manufacturing process that produces mower blades during the most recent shift. Elizabeth Burke has asked you to study these data from an analytics perspective. Drawing upon your experience, you have developed a number of questions: For the mower test data, what distribution might be appropriate to model the failure of an individual mower? What fraction of mowers fails the functional performance test using all the mower test data? What is the probability of having x failures in the…
Calcium is the most abundant mineral in the human body and has several important functions. Most of the body calcium is stored in the bones and teeth, where it functions to support their structure. Recommendations for calcium are provided in Dietary Reference Intakes, developed by the Institute of Medicine of the National Academy of Sciences. The recommended adequate intake (RAI) for calcium for adults (ages 19-50) is 1000 mg per day. A random sample of 18 adults with incomes below the poverty level gave the following calcium intakes:886 633 943 847 934 8411193 820 774 834 1050 10581192 975 1313 872 1079 809Assume the population standard deviation for daily calcium intake for adults with incomes below the poverty level is 188mg.At the 0.05 level of significance, does the data provided above provide evidence to suggest that the mean calcium intake of all adults with incomes below the poverty level is less than the RAI pf 1000mg per day? Step 1: Define the parameter & setup the…

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