This is statistics course and I need help with answering those questions. If you don't have much time to provide solutions, that's fine but I need correct answers asap. Thank you

D Question 16 1 pts Given the following information, calculate the standard deviation. n = 19 and E(21 - 2) = 395 O 19.9 86.7 O 86.6 O 4.7 O cannot be determined with given informationD Question 17 1 pts If a distribution is skewed to the left with no outliers, which of the following is true? mean median O mean = median O mean ~ median O cannot be determinedQuestion 20 1 pts Use the following information to find the least square regression line. x= 243.5 y = 3.27 r=-0.879 Sx = 193.4 Sy = 0.96 O y = 4.33 + 0.0044x O y= 3.27 + 0.96x O y= 3.27 - 0.879x O y = 243.5 + 193.4x O y = 4.33 - 0.0044xQuestion 21 1 pts Every day for two weeks, a convenience store owner kept track of the number of sports drink sold and the average temperature. Based on his data, the least square regression line is y - -950.152 + 16.416x, where x is the number of degrees Fahrenheit. Which of the following best describes the meaning of the slope. For each increase in temperature of 10, the estimated number of sports drink sold increases by 16.41. For each increase in temperature of 10, the estimated number of sports drink sold decreases by 16.41. For each increase in sports drink sales, the estimated temperature increases by 16.41. For each increase in sports drink sales, the estimated temperature decreases by 16.41. The slope has no meaning because the units of measure for x and y are not the same