Answer:
1.89 is the standard deviation of households who own a riding mower
Step-by-step explanation:
Let the random variable X denote the number of households owning a riding lawn mower. From the given information, X will be a Binomial random variable with parameters; n = 17 and p = 30% = 0.3
The standard deviation of X;


X^2 = 8^2 + 5^2
x^2 = 64 + 25
x^2 = 89
x =
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9.4339811321
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Y2-Y1. 77-11 66 11
———— = ———- = —- = —
X2-X1 42-6 36 6
So what you would do is divide 988 by 26 and divide 731 by 17 and those two numbers you would add which gives you the amount of people that attended the performance