The correlation between hours of sleep and hours of study is r = 0.14. (a) Calculate r². (Round your answer to four decimal places.) ,2 = = (b) Choose a sentence that interprets value r². 1.96% of the variation in hours of sleep is not explained by hours of study. Variation in hours of study explains about 1.96% of the observed variation in hours of sleep. 1.96% of the variation in hours of sleep is not explained by the variation in hours of study. Hours of study explains about 1.96% of the observed variation in hours of sleep.

31 percent of students are male. 35 percent of students take a Statistics course. 47 percent of male students take statistics. Give your answers as a decimal to 4 decimal places.(a) What percent of students are male that take a statistics course?  (b) What percent of students are females that take a statistics course?

The given figure displays the relationship between golfers' scores on the first and second rounds of the 2019 Masters Tournament.   The correlation is ?=0.283.is �=0.283. The provided figure gives data on number of boats registered in Florida and the number of manatees killed by boats for the years 1977 to 2018.   The correlation is ?=0.919.is �=0.919. Explain in simple language why knowing only these correlations enables you to say that prediction of manatee deaths from number of boats registered by a regression line will be much more accurate than prediction of a golfer's second-round score based on that golfer's first-round score.

Lecture(12.8): A researcher thinks that people have become more anxious when they hear about violent crime in the news. He asked a group of random participants to fill out two questioners. One questionere measured anxiety on a point scale from 1 to 10 with high anxiety  resuting in higher scores. The other questionare asked participants to report the incidents  of violent crime they had heard about   (throuh media or face- to-face cummincation) in the last two weeks. The researcher gave the participants a score based on the total number of incidents reported.   (1) What type of test should  the researcher use to test this hypothesis.? (2) What would be the null and alternative hypotheses for this study?    (Select two answers for each)   (a) Z test   (b)single sample t test   (c)dependent sample t-test   (d) independent sample t -test   (e) ANOVA   (f) Pearson correlation t-test (roe)   (g) Chi Square goodness of fit test.    (h)Chi Square test for independece   (i)Ho: roe<=0…

3-B. Write each answer with a reasonable number of figures. Find the absolute and percent relative uncertainty for each answer. 4.16 (+0.01)] X 7.068 2 (+0.000 4) = ? (a) [12.41 (0.09) (b) [3.26 ( 0.10) x 8.47 (+0.05)] - 0.18 (0.06) = ?

The scatterplot illustrates the relationship between distance and success rate of field-goal attempts for a Which of the following is an accurate description of the scatterplot? sample of football kickers. The kickers have unusually low success rates when the distance is large. Field-Goal Distance and Success Rate The kickers have unusually high success rates 80 when the distance is small. 75 As the distance of the attempt increases, the 70 kickers have a lower success rate for their field goals. As the distance of the attempt increases, the kickers tend to have a lower success rate for their field goals. 45 40 35 20 25 30 35 40 45 50 55 60 65 70 Distance (yd) Mark this and return Save and Exit Next Submit Success Rate (%)

What does the graph reveal about the relationship between age groups and the use of smartphones for navigation?

could you please write it with pen and paper? i appreciate it

Match the coefficient of determination to the scatter diagram. The scales on the x-axis and y-axis are the same for each scatter diagram. (a) R = 0.94, (b) R² = 0.27, (c) R = 1 (a) Scatter diagram Explanatory (b) Scatter diagram (c) Scatter diagram Explanatory Explanatory Resporse Response ƏSuodsay

Research suggests that spending time with animals can reduce blood pressure. I want to know whether particular animals are better at reducing blood pressure than others. I randomly select 10 participants. Each participants' blood pressure is measured when they enter the lab (Time 1; baseline). Participants' blood pressure is then measured again after they spend a half-hour with a dog. Lastly, participants' blood pressure is measured a third time after they spend a half-hour with a cat. 1. How many levels of the IV are there? A. 3 B. 2 C. 4 D. 1 2. Is the scenario above between- or within-subjects? A. Within-Subjects B. Between-Subjects   3. What test would be used to analyze the scenario above? A. One-Way Repeated Measures ANOVA B. One-Way Between-Subjects ANOVA C. Independent Groups t-test D. Correlated Groups t-test