The point estimates for the mean and standard deviation of the given data is respectively; 68 and 17.6
A) To find the point estimate of the mean, we add all up all the data and divide by the number of values.
Thus;
∑x = 57 + 61 + 86 + 87 + 72 + 73 + 19 + 56 + 81 + 79 + 83 + 75 = 816
n = 12 numbers
Thus;
mean = ∑x/n = 816/12
Mean = 68
B) To find the estimate of the standard deviation, we would get it from the formula;
s = √[(n*(∑x²) - (∑x)²)/n(n - 1)]
∑x² = 572 + 612 + 862 + ... + 742 = 59,010
s = √[ (12*(59,010) - (816)²)/(12)(11)]
s = 17.6
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Answer:
The answer is 53
245 = 5y - 20 | y = 53
Step-by-step explanation:
subtracting 20 ( - 20) represents "twenty days less"
5y represents "five times the number of days"
This is all being compared to Kendra's 245 days of perfect attendance which is why it's "245 ="
Plug it in! & don't forget PEMDAS ----> 5(53) - 20 = 245
Answer:
The answer to your question is: x = 1/4
Step-by-step explanation:
x =
It is 1/4 because 4 times equals 1
A) 75x+50(20-x)=1200
B) 75(20 - x) + 50x = 1200
C) 75x + 50x = 20(1200)
Answer:
letter c
Step-by-step explanation:
all real values of x where x < −2
all real values of x where −2 < x < 4
all real values of x where 1 < x < 4
all real values of x where x < 0
The values for which the graph is negative and increasing are all real values of x where 1 < x < 4.
Given
The graph of function;
A graph goes from being negative to positive (or the other way around) by passing through the x-axis. in other words when f(x) = 0.
Then,
For increasing and decreasing for anything other than a quadratic and linear function you need calculus.
The function is negative below the zeros which would be from -2 to 4.
It would be increasing from the vertex to zero,4.
Hence, the values for which the graph is negative and increasing are all real values of x where 1 < x < 4.
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B f(x) = 3(8.35)x
C f(x) = 3(8.25x)
D f(x) = 487.97x
Answer:
Option B-
Step-by-step explanation:
Given function:
Simplifying the function :
Step 1: Write the expression
Step 2: Apply exponent rule ( )
Step 3: Solve
Therefore, Option B is correct