julie jot 21 of the 23 questions of her math test correct she got 29 of the 32 questions on her science test correct on which te
2 answers:
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Answer:
r = 3
Step-by-step explanation:
q = k /
k = q = 1.2 x 3 x 3 = 10.8
q = 10.8/
1.2 = 10.8/
r = = 3
Answer:
Step-by-step explanation:
Hello!
The given data represents the number of units sold last month by each of the representatives of the Company.
Representative 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
Month sales 2, 3, 2, 3, 3, 4, 2, 4, 3, 2, 2, 7, 3, 4, 5, 3, 3, 3, 3, 5
To calculate the mean you need to use the following formula:
X[bar]= ∑x/n = 66/20= 3.3
You expect that on average 3.3 products were sold lasrt month.
The standard deviation is the square root of the variance, so you first calculate the variance and then the standard deviation:
S²= [∑x²- (∑x)²/n ]=
= 1.589
S= 1.26
The sales show a dispersion of 1.26 arround the average value.
I hope it helps!