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- Which of the following is a research hypothesis? A. Liberals and conservatives have the same voting rates. B. The rates of that senior citizens receive moving violations are not different from rates of moving violations seen in teenagers. C. White and African Americans watch the same amount of TV. D. Men and women have different levels of income.Scatterplots Which of the scatterplots below showa) little or no association?b) a negative association?c) a linear association?d) a moderately strong association?e) a very strong association?edo exercises 17 and 18 in section 8.1 of your textbook, about the small animal who lives in an area with woods and meadows, using the following data:If the animal is in the woods on one observation, then it is twice as likely to be in the woods as the meadows on the next observation. If the animal is in the meadows on one observation, then it is three times as likely to be in the meadows as the woods on the next observation.Assume that state 1 is being in the meadows and that state 2 is being in the woods.(1) Find the transition matrix for this Markov process. (2) If the animal is initially in the woods, what is the probability that it is in the woods on the next three observations? (3) If the animal is initially in the woods, what is the probability that it is in the meadow on the next three observations?
- An agricultural economist assumes that there is a linear relationship between the amounts of fertilizer supplied to tomatoes obtained. Eight tomato plants, of the same variety, were selected at random and treated, weekly, with a solution in which x grams of fertilizer was dissolved in a fixed quantity of water. The yield, y kilograms, of tomatoes was recorded. Plants A B C D E F G H X 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Y 3.9 4.4 5.8 6.6 7.0 7.1 7.3 7.7 Use a graphical method to explain if the agricultural economist was correct to assume a linear relationship between the amounts of fertilizer used and subsequent yields. Calculate the equation of the least square’s regression line. Estimate the yield of a plant treated, weekly, with 3.2 grams of fertilizer.A rehabilitation counselor believes that an increase in the number of social visits to a patient over the course of a week in the hospital will increase the patient's daily levels of positive mood. The counselor ensures that patients are limited to only three people during each visit. What is the null hypothesis for this relationship? a. H0: r < 0 b. H0: r ≤ 0 c. H0: ρ > 0 d. H0: ρ ≤ 0Data were collected from libraries about the number of patrons who have overdue books and how long they have been using the library. Years Using Library 1 1 1.5 3 3.5 5 7 10 Number of Overdue Books 12 9 10 6 5 4 2 2 The equation ŷ = 12(0.81)x is a model that fits the data. Which of the following uses the model correctly and is an example of extrapolation? A patron who has been using the library for 2 years is predicted to have between 7 and 8 overdue books. A patron who has been using the library for 13 years is predicted to have between 6 and 7 overdue books. A patron who has been using the library for 2 years is predicted to have more than 94 overdue books. A patron who has been using the library for 13 years is predicted to have less than 1 overdue book.
- dietitian wishes to see if a person’s cholesterol level will change if the diet is supplemented by a certain mineral. Five randomly selected subjects were pre-tested, and then they took the mineral supplement for a 6-week period. The Cholesterol level before and after taking the mineral supplements are shown in table below. (Cholesterol level is measured in milligrams per deciliter). Subject: 1 2 3 4 5 Before: 207 210 190 172 225 After: 212 200 188 174 250Define hypothesis? Refer the given model and develop alternate hypotheses of each variable. (Hint: Only adopt one approach, i.e., directional or non-directional).Maintaining your balance may get harder as you grow older. A study was conducted to see how steady the elderly is on their feet. They had the subjects stand on a force platform and have them react to a noise. The force platform then measured how much they swayed forward and backward, and the data is in following table ("Maintaining balance while," 2013). Table: Forward/backward Sway (in mm) of Elderly Subjects 19 30 20 19 29 25 21 24 50 Do the data show that the elderly sway more than the mean forward sway of younger people, which is 18.125 mm? Test at the 5% level. (x) Select the statement that most correctly interprets the result of this test: A. The result is statistically significant at .05 level of significance. Evidence supports the claim that the mean sway forward and backward of elderly people is more than 18.125 mm, the sway of younger people. B. The result is statistically significant at .05 level of significance. There is not enough…
- Maintaining your balance may get harder as you grow older. A study was conducted to see how steady the elderly is on their feet. They had the subjects stand on a force platform and have them react to a noise. The force platform then measured how much they swayed forward and backward, and the data is in following table ("Maintaining balance while," 2013). Table: Forward/backward Sway (in mm) of Elderly Subjects 19 30 20 19 29 25 21 24 50 Do the data show that the elderly sway more than the mean forward sway of younger people, which is 18.125 mm? Test at the 5% level. (iv) Determine sample mean x :iv Determine sample mean x : Enter answer to nearest ten-thousandth, without units of measure. Examples of correctly entered answers: 11.2385 0.0079 3.0500 7.4000 (v) Determine sample standard deviation s :v Determine sample standard deviation s : Enter in decimal form to nearest thousandth. Do not enter units of measure. Examples…Maintaining your balance may get harder as you grow older. A study was conducted to see how steady the elderly is on their feet. They had the subjects stand on a force platform and have them react to a noise. The force platform then measured how much they swayed forward and backward, and the data is in following table ("Maintaining balance while," 2013). Table: Forward/backward Sway (in mm) of Elderly Subjects 19 30 20 19 29 25 21 24 50 Do the data show that the elderly sway more than the mean forward sway of younger people, which is 18.125 mm? Test at the 5% level. (vii) Calculate and enter test statistic Enter value in decimal form rounded to nearest ten-thousandth, with appropriate sign (no spaces). Examples of correctly entered answers: –2.0140 –0.0307 +0.6000 +1.0009 (viii) Using tables, calculator, or spreadsheet: Determine and enter p-value corresponding to test statistic. Enter value in decimal form rounded…Maintaining your balance may get harder as you grow older. A study was conducted to see how steady the elderly is on their feet. They had the subjects stand on a force platform and have them react to a noise. The force platform then measured how much they swayed forward and backward, and the data is in following table ("Maintaining balance while," 2013). Table: Forward/backward Sway (in mm) of Elderly Subjects 19 30 20 19 29 25 21 24 50 Do the data show that the elderly sway more than the mean forward sway of younger people, which is 18.125 mm? Test at the 5% level. (i) Which of the following statements correctly defines the null hypothesis HO? A. p > 18.125 mm B. μ = 18.125 mm C. p = 18.125 mm D. μ > 18.125 mm Enter letter corresponding to correct answer (ii) Which of the following statements correctly defines the alternative hypothesis HA? A. p > 18.125 mm B. μ = 18.125 mm C. p = 18.125 mm D. μ > 18.125 mm Enter…