Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Birthrate, x (number of births per 1000 pop.) 18.9 36.3 49.6 47.3 50.5 40.9 14.3 25.0 32.0 26.0 48.3 14.6 Send data to calculator Female life expectancy, y (in years) 74.3 66.5 60.8 59.5 59.3 64.2 73.6 74.5 64.0 70.5 54.1 75.0 Send data to Excel Female life expectancy (In years) 85 80+ 75+ 70+ 65- 60- 55- 50 Birthrate (number of births per 1000 pop.) Figure 1 The value of the sample correlation coefficient for these data is approximately -0.938. Answer the following. Carry your intermediate computations to at least four decimal places, and round your answers as specified below. (If necessary, consult a list of formulas.) (a) What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. (b) What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places. 0

Using the following stem & leaf plot, find the five number summary for the data by hand. 1|01 2 166 3|16 41 349 5122478 6 14 Min = 10 o Q1 = 41 Med = 37 Q3 = 76 Max = 64 X X X

Use a calculator or computer software to generate a normal quantile plot for the data in the accompanying table. Then determine whether the data come from a normally distributed population. Click the icon to view the data set. Generate a normal quantile plot for the data. Choose the correct graph below. OA. 3.00 2.00- 1.00- 0.00- -1.00- -2.00- -3.00- 0 100 200 300 400 500 X Value Data table Space Flight Durations (hours) 0 350 100 400 300 200 50 150 200 OB. 3.00- 2.00- Print 1.00- 0.00- -1.00- -2.00- -3.00+ 0 BEELD 100 200 300 400 500 X Value 300 300 200 100 450 200 50 0 0 400 100 450 G Determine whether the data come from a normally distributed population. Choose the correct answer below. OA. The distribution is not normal. The points are not reasonably close to a straight line. OB. The distribution is normal. The points show a systematic pattern that is not a straight-line pattern. OC. The distribution is normal. The points are not reasonably close to a straight line and do not show…

The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states. 11.9 8.5 3.5 2.3 2.7 2.6 0.3 13.8 11.1 10 5.7 6.4 6.4 4.3 I = thousands of automatic weapons y = murders per 100,000 residents This data can be modeled by the equation y = 0.82x + 4.09. Use this equation to answer the following; Special Note: I suggest you verify this equation by performing linear regression on your calculator. A) How many murders per 100,000 residents can be expected in a state with 6 thousand automatic weapons? Answer = Round to 3 decimal places. B) How many murders per 100,000 residents can be expected in a state with 10.6 thousand automatic weapons? Answer = Round to 3 decimal places. Question Help: Video O Message instructor Submit Question 目 hp -> #3 & 4. 8. 00 %24