For Problemns 1-4: The table at right shows the probability of the number of students with "Mathitus anmong 4 randomly selected students. P(x) 0- 0.20 1 0.40 0.25 3 0.10 4 0.05 3. What is the standard...

Extracted text: For Problemns 1-4: The table at right shows the probability of the number of students with "Mathitus anmong 4 randomly selected students. P(x) 0- 0.20 1 0.40 0.25 3 0.10 4 0.05 3. What is the standard deviation (to nearest 0.1) of the number of students with Mathitus? [Show all of your work with a table.] 4. What is the maximum usual value of the number of students with Mathitus? Would 3 students with Mathitus among 4 randomly selected students be considered significantly high? [Note that within two standard deviations of the mean is considered usual or non-significant.]