7. A guy took a sample of 10 midterm exam scores from a class of 30 students. The 10 scores are shown in the table below:

95

67

76

47

85

70

87

80

67

72

a) What is the sample mean?

(b) What is the sample standard deviation? (Round your answer to two decimal places)

(c) If you leveraged technology to get the for part (a) and/or part (b), what technology did you use? If an online applet was used, please list , and describe the steps. If Excel was used, please write out the function.