Four brands of lightbulbs are being considered for use in the final assembly area of the Ford F-150 truck plant in Dearborn, Mic
1 answer:
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Answer:
a)
b) 1.64
c) (16.57,19.85)
d) The sample size must be 135 or greater if the error must not exceed $1.00.
Step-by-step explanation:
We are given the following information in the question:
Sample size, n = 50
Sample mean = $18.21
population standard deviation = $5.92
a) Point estimate for the population mean cost
b) Margin of error =
Margin of error =
c) 95% Confidence interval
Putting the values, we get,
d) Marginal error less than $1.00
Thus, the sample size must be 135 or greater if the error must not exceed $1.00.
(i) Use the formula for the determinant of a 2×2 matrix.
(ii) The adjugate matrix is the transpose of the cofactor matrix of A. (These days, the "adjoint" of a matrix X is more commonly used to refer to the conjugate transpose of X, which is not the same.)
The cofactor of the (i, j)-th entry of A is the determinant of the matrix you get after deleting the i-th row and j-th column of A, multiplied by . If C is the cofactor matrix of A, then
Then the adjugate of A is the transpose of C,
(iii) The inverse of A is equal to 1/det(A) times the adjugate:
(iv) The system of equations translates to the matrix equation
Multiplying both sides on the left by the inverse of A gives
Answer:
Hypotenuse: 100
Segment Adjacent to the leg: 36
x=60
Step-by-step explanation:
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