The amounts A (in billions of dollars) donated to support higher education in the United States from 2000 through 2007 are shown in the table, where t represents the year, with t= 0 corresponding to 2000. Year, t Amount, A 30.6 1 32.3 34.3 3 57.7 4 38.1 42.8 6. 48 7 52.8 Use a graphing utility to create a scatter plot of the data.

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? = 0.12, (b) R2 = 0.98, (c) R? = 0.58 (a) Scatter diagram Eplantory (b) Scatter diagram (e) Scatter diagram Esplanatory II Eplanatory

Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? For a random sample of tropical cyclones, let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. x 1004 975 992 935 989 928 y 40 100 65 145 80 147   (a) Make a scatter diagram of the data and visualize the line you think best fits the data.   (b) Would you say the correlation is low, moderate, or strong? low moderate     strong   Would you say the correlation is positive or negative? positive negative       (c) Use a calculator to verify that          x = 5823,          x2 = 5,656,235,          y = 577,          y2 = 64,859  and          xy = 553,251   Compute r. (Round your answer to four decimal places.)     As x increases, does the value of r imply that y should tend to increase or decrease? Explain your answer. Given our value of r, y…

T stat please      An annual championship event is the most widely watched sporting event in a country each year. In recent​ years, there has been a great deal of interest in the ads that appear during the game. These ads vary in length with most lasting 30 seconds or 60 seconds. The accompanying data represent the ad length and ad scores from a recent championship. Complete parts​ (a) through​ (c).   ​30-Second Ads ​60-Second Ads   48 27 40 39 47 65 59 58 60 53   40 23 36 53 54 24 39 38 47 61         a. Assuming that the population variances from the​ 30-second ads and the​ 60-second ads are​ equal, is there evidence of a difference in the mean score between the two types of​ ads? Use α=0.02.   Let μ1 be the mean score for the​ 30-second ads and μ2 be the mean score for the​ 60-second ads. Determine the hypotheses. Choose the correct answer below.     A. H0​: μ1≥μ2 H1​: μ1<μ2   B.…

Fireworks and Injuries These data were obtained for the years 1993 through 1998 and indicate the number of fireworks (in millions) used and the related injuries.   Fireworks in use  x Related injuries  y 67.6 12 87.1 12 117 12 115 10 118 7800 Send data to Excel   Draw a scatter plot.

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Follow up question about the Plot. What Pattern do you see in the residual plot? is it  A.The points are fairly evenly distributed in a rectangular pattern along the zero line. B.The points form a slight U shape around the zero line. C.Substantially more points are concentrated below the zero line than above it. D.The points spread in a fan shape left to right around the zero line.

Scatter Plot Instructions: Use technology to create a scatter plot for the data below. Then find the answers to the following questions. (Note: You will not turn in the scatter plot for this question.) Weight (Ibs.) 173 184 194 214 168 220 188 188 207 167 217 Systolic Blood Pressure 132 143 153 162 154 168 137 149 159 128 166 1. What is the response variable? Systolic Blood Pressure + 2. What is the explanatory variable? Weight 3. What is the equation of the linear regression line? y = a x (Round to the nearest hundredth, if necessary.) (Round to the 4. If person's weight is 150, what can we expect the systolic blood pressure to be? nearest whole number, if necessary.) This is an example of extrapolation + 5. The sample correlation coefficient is (Round to the nearest hundredth, if necessary.) This number indicates that there is a strong positive correlation between the explanatory and response variables. Please answer all parts of the question. Next page stv MacBook Air 20 F3 000 F4…

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The data in the accompanying table represent the length of life, in years, measured to the nearest tenth, of 30 similar fuel pumps. Complete parts (a) through (c) below. Click the icon to view the fuel pump data. (a) Construct a stem-and-leaf plot for the life in years of the fuel pumps, using the digit to the left of the decimal point as the stem for each observation. Stem Leaf Frequency Get more help. Fuel Pump Life Spans 2.4 3.3 0.4 3.1 1.3 0.2 0.5 5.6 5.9 6.2 0.5 2.4 1.4 4.3 6.3 1.7 4.9 0.2 4.6 0.4 1.5 0.5 2.3 4.8 1.0 5.6 5.9 6.0 1.2 0.2 Print Done -X eck answ