A girl’s name is “Olivia Summer” so her initials are OS. How many people need to be in an auditorium to ensure that at least 4 people in that room have the same pair of initials?

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3