Question 20 5.0 calculate the standard deviation for the following set of numbers: 73, 76, 79, 82, 84, 84, 97

7.16.

Step-by-step explanation:

The variance is ∑ (x - m)^2 / N   and the standard deviation is the square root of this.

m is the mean of the data . Here it is  82.14.

Construct a table:

x    (x - m)     (x - m)^2

73    -9.14       83.54

76     -6.14      37.70

79      -3.14        9.86

82      -0.14        0.02

84       1.86        3.46  

84        1.86        3.46

97       14.86    220.82

Total:             358.86

Variance =  358.86 / 7 =  51.27

Standard deviation = √51.27 = 7.16.

answer: for each 3 girls there is 2 boys . 3: 2

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you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24