In Exercises find the steady-state vector. .8 .2 .5
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- Data 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.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?
- “The incidence of depression among college students is negatively correlated with the number of sunny days each year in the locale where they attend college.” This statement means that: a. a student attending college in a locale with very few sunny days will become depressed. b. if a depressed student were to move to a locale with more sunny days, the student's depression would subside. c. the chances of a college student being depressed tend to increase as the number of sunny days increases. d. the chances of a college student being depressed tend to increase as there are fewer sunny days.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?Temperature has a direct correlation with aggression. Knowing this, a researcher predicts that participants completing a frustrating task will express more aggression when they are in a 90-degree room than a 70-degree room. The researcher finds t(20) = 2.33, p < .05. Knowing this, what should his research conclusion be? A. That people were equally aggressive in the 70-degree room and 90-degree room. B. That people were more aggressive in the 90-degree room than the 70-degree room. C. Unfortunately, there is not enough information to make a full conclusion. D. That people were more aggressive in the 70-degree room than the 90-degree room.
- 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 ≤ 0An 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.Interpret effect size t(30)=1.12, p=.34, n2=.001 small, medium, or large
- Your team members conducted a study where they had participants watch a lecture video in either (a) virtual reality (VR), (b) large projector screen (PS), or (c) a computer screen (CP). They are interested in whether immersion, such as that experienced when in a learning while wearing a virtual reality helmet, increases students’ grades and decreases mind wandering in class. At one point in the middle of the lecture, participants were interrupted to answer a question about their thoughts. They answered the question, “were you thinking about something other than the lecture?” on a scale from 1 (not at all) to 9 (extremely). This question measures what psychologists call “task-unrelated thought” (TUT) and it’s a common measure of mind wandering pertaining to learning because it assesses whether students are experiencing thoughts that are off-topic and unrelated to the task at hand (i.e., listening to a lecture). At the end of the lecture, participants completed a brief quiz to measure…9. Identify the dependent variable in the statement below " the cost of a smartphone depends on its brand and model"Use the data and develop a model to predict Overall Satisfaction. R2 is over 0.70 so we can use this model. Group of answer choices True False Brokerage Satisfaction with Trade Price Satisfaction with Speed of Execution Overall Satisfaction with Electronic Trades Scottrade, Inc. 3.4 3.4 3.5 Charles Schwab 3.2 3.3 3.4 Fidelity Brokerage Services 3.1 3.4 3.9 TD Ameritrade 2.9 3.6 3.7 E*Trade Financial 2.9 3.2 2.9 (Not listed) 2.1 3.2 2.7 Vanguard Brokerage Services 2.0 3.8 2.8 USAA Brokerage Services 2.1 3.8 3.6 Thinkorswim 1.9 2.6 2.6 Wells Fargo Investments 2.2 2.7 2.3 Interactive Brokers 3.1 4.0 4.0 Zecco.com 2.5 2.5 2.5 Firstrade Securities 3.0 3.0 4.0 Banc of America Investment Services 4.0 1.0 2.0
