The quadrilateral ABCD is a rhombus with BD = BC. On the side
1 answer:
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Answer:
x³ sin(x)
Step-by-step explanation:
Tabular method is a special form of integration by parts. It works by taking derivatives of u and integrals of dv. You multiply diagonally, then sum the results, alternating the signs.
The important thing to note is that this will produce an antiderivative only if the derivatives of u eventually become 0. So the correct choice is x³ sin(x), because the derivatives of x³ eventually becomes 0:
d/dx (x³) = 3x²
d/dx (3x²) = 6x
d/dx (6x) = 6
d/dx (6) = 0
A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that her estimate includes the actual college population mean
It means confidence level is 0.85.
After taking survey the estimate of population standard deviation is found as 4.5 years. The given margin of error is 0.5 years
The sample size is obtained using formula
n=
Where std = standard deviation
alpha = 1 -c = 1-0.85 = 0.15
z(α/2) = z(0.15/2) = z(0.075)
It is the critical value of z such that area above z and below -z is 0.075
Use z score table to find the probability exactly or very close to 0.075 and note the corresponding z score value.
In z score table there is no accurate 0.075 probability value. The close value is 0.0749 which corresponds to z score -1.44
For calculation we take positive z score value.
So we get z(α/2) =1.44
Using all the given values into formula
n = [(1.44 * 4.5) / 0.5]^2
n = 167.96
Rounding it to nearest integer we get n=168
The number of people need to surveyed is n=168
