The table below shows the frequency distribution for 22 students on a test with a maximum score of 99. Use this data to answer questions 4 and 5:

Score

1 Frequency

50 - 59

60 - 69

3

70 - 79

6

80 - 89

9

90 - 99

3

Totals

The mean score, , of the data in the frequency distribution above is (to the nearest 1/10) __________

The standard deviation is? (to the nearest 1/10) __________