THINK4

Which correlation represents the weakest linear relationship between x and y? Select one: a. 0.50 b. 0.75 c. -0.89 d. -0.05

Interpret the unstandardized coefficient for highest years of schooling. E.g., Is the relationship positive or negative? How does a one-unit change in schooling (i.e. an increase in one-year of education) influence Y?  Interpret the constant (i.e. the intercept) in the equation? What does it indicate? Calculate the average number of hours watched for someone with 12 years of education.

In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushes per acre). Calculate the linear coefficient. Rainfall (in inches), x 9.4 7.7 12.3 11.4 17.7 9.2 5.9 14.5 14.9 Yield (bushels per acre), y 46.5 42.2 54.8 55 78.4 45.2 27.9 72 74.8   Answer choices are: A. 0.900          B. 0.981       C. 0.899      D. 0.998

Q9: Please type your answer and show your work by typing

The scatter plot above depicts the relationship between a person’s height measured in meters (H) andweight measured in kilograms (W). The line of best fit is shown.• The equation of the line of best fit is ?? = −114.3 + 106.5??.• The coefficient of determination (??2) equals 0.497. a. What is the slope of the line of best fit?b.  Construct interpretation of the slope which includes the height and weight in this example

A river was found to be contaminated with toxins at a concentration of 0.006 grams per cubic meter near a mine tailings pond. 1500 meters away, the concentration was found to be 0.004 grams grams per cubic meter. Assume the concentration drops off linearly going downstream, and it is uniform over the 50 square meter cross section. How many grams of toxins do you estimate have leaked from the tailings pond? a. 675 grams b. 650 grams c. 700 grams d. 625 grams

Let n be the number of oil refineries at t years since 2004. A reasonable model of the number of oil refineries is n=−3.08t+174.19.   a. What is the​ slope? What does it mean in this​ situation? b. What is the​ n-intercept? What does it mean in this​ situation? c. Predict the number of refineries in 2017.

Choose the coefficient of determination that matches the scatterplot. Assume that the scales on the horizontal and vertical axes are the same. Response Explanatory R2 = 0.73 R2 = -0.53 R2 = 0.98 R2 = 0.12

A superconducting "bullet" train is researched and tested on a track. The steepest section of the track has a rise of 1995 meters for a horizontal distance of 6650 meters. What is the grade of this section of track? 1995meters 6650 meters The grade is %.

The Coast Starlight Amtrak train runs from Seattle to Los Angeles. The scatterplot below displays the distance between each stop (in miles) and the amount of time it takes to travel from one stop to another (in minutes).   Describe the relationship between distance and travel time. Answer How would the relationship change if travel time was instead measured in hours, and distance was instead measured in kilometers? Answer Correlation between travel time (in miles) and distance (in minutes) is r=0.636.r=0.636. What is the correlation between travel time (in kilometers) and distance (in hours)?

John used the formula for calculating the linear correlation coefficient r and got the value 1.3284. Is he right or wrong? Explain with reasoning.

a. Use the two points for nationality B to find an equation in the form y = mx +b that models the percentage of nationality B, y, in the country x years after 2003. Round m to two decimal places. The graph below shows the percentage of nationalities A and B in a certain country x years after 2003. 80%- (0,69) y=D (Type your answer in slope-intercept form. Use integers or decimals for any numbers in the expression.) Nationality A 60%- b. Use the model from part (a) to project the percentage of nationality B in the country in 2103. (47 53) 40%- % (Round to the nearest percent as needed.) 20%- Nationality B (47,25) (0,10) 20 50 30 Years after 2003 10 40 Enter your answer in each of the answer boxes. 3:00 PM ENG 5/15/2021 9 Type here to search 近

The accompanying table shows the number of text messages sent and received by some people in one day. Complete parts​ (a) through​ (d) below.

Please type the answer. (I already tried 106.02 for the answer and it said it was wrong.)