Need help on part 3 of 3 . Finding the Standard Deviation

Y 0 1 2 3 4 P(X) 0.20 0.33 0.45 0.01 0.01 Send data to Excel ollo Part 1 of 3 Find the mean. Round the answer to two decimal places as needed. Mean: H = 1.30 Alternate Answer: H = 1.3 Part 2 of 3 V Find the variance. Round the answer to two decimal places as needed. Variance: 0 = 0.69 Part: 2 / 3 Part 3 of 3 Find the standard deviation. Round the answer to two decimal places as needed. Standard deviation: o =