Listed below are the arrival delay times (in minutes) of randomly selected airplane flights from one airport to another. Negative values correspond to flights that arrived early before the scheduled arrival time, and positive values represent lengths of delays. Find the range, variance, and standard deviation for the set of data. Some of the sample values are negative, but can the standard deviation ever be negative? -8 - 2 14 - 29 - 19 - 8 -5 The range of the sample data is minutes. (Round to one decimal place as needed.) The variance of the sample data is minutes". (Round to one decimal place as needed.) The standard deviation of the sample data is minutes. (Round to one decimal place as needed.) Some of the sample values are negative, but can the standard deviation ever be negative? O No, because the squared value in the standard deviation formula cannot be negative. O Yes, because the squared value in the standard deviation formula can be negative. O No, because the squared value in the standard deviation formula can be negative. Yes, because the squared value in the standard deviation formula cannot be negative.

Mean Temperature (°C) The following scatterplot shows the mean annual carbon dioxide (CO,) in parts per million (ppm) d) What is the meaning of the slope of this equation? measured at the top of a mountain and the mean annual air temperature over both land and sea across the globe, in degrees Celsius (C). Complete parts a through h on the right. O A. For every degree that the mean temperature increases, CO, levels increase by 0.004 ppm. 16.800 O B. For every 0.004 ppm increase in CO, levels, the mean temperature increases by 1°C. 16.725 OC. For every 1 ppm increase in CO, levels, the mean temperature increases by 0.004°C. 16.650 O D. The slope does not have a meaningful interpretation in the context of this problem. 16.575 16.500 e) What is the meaning of the y-intercept of this equation? 337.5 CO, (ppm) 350.03 325.0 362.5 A. For every 1 ppm increase in CO, levels, the mean temperature increases by 0.004°C. Click here to view the regression output. O B. When the CO, level is 0 ppm, the…

OL th.. Frequency 8 9 0 T 10 20 30 40 LEAD 50 60 70 80 Data were collected on the lead levels of children of battery factory workers. The data are displayed in the histogram above. Choose the correct answer. The maximum lead level is less than 60 The median lead level (the level that exactly half the children exceed) is less than 30 There are 33 children in the data set. None of the other answers is true

No written by hand solution

Identify the variable as either qualitative or quantitative.(a) months in the year (b) distance of a successful field goal during a football season

Mean Temperature (°C) The following scatterplot shows the mean annual carbon dioxide (CO,) in parts per million (ppm) d) What is the meaning of the slope of this equation? measured at the top of a mountain and the mean annual air temperature over both land and sea across the globe, in degrees Celsius (C). Complete parts a through h on the right. O A. For every degree that the mean temperature increases, CO, levels increase by 0.004 ppm. 16.800 O B. For every 0.004 ppm increase in CO, levels, the mean temperature increases by 1°C. 16.725 OC. For every 1 ppm increase in CO, levels, the mean temperature increases by 0.004°C. 16.650 O D. The slope does not have a meaningful interpretation in the context of this problem. 16.575 16.500 e) What is the meaning of the y-intercept of this equation? 337.5 CO, (ppm) 350.03 325.0 362.5 A. For every 1 ppm increase in CO, levels, the mean temperature increases by 0.004°C. Click here to view the regression output. O B. When the CO, level is 0 ppm, the…