statistics

P(x) 0 0.25 1 0.05 2 0.25 0.45 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places 2 Ages Number of students 15-18 19-22 23-26 4 27-30 9 31-34 35-38 8 Based on the frequency distribution above, find the relative frequency for the class 35-38 . Relative Frequency = 9% Give your answer as a percent, rounded to one decimal place W Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 14 18 20 52 Female 16 15 7 38 Tota 30 33 27 90 If one student is chosen at random, Find the probability that the student did NOT get an "B" The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 20 25 30 35 40 Salary (thousands of $) Q If a person is making the maximum salary for a construction worker, they are making more than what percentage of Teachers? They are making more than 9% of Teachers. 5 Ages Number of students 15-18 19-22 3 23-26 27-30 9 31-34 4 35-38 8 Based on the frequency distribution above, find the relative frequency for the class 35-38 Relative Frequency = 96 Give your answer as a percent, rounded to one decimal place