if f(x)=8x²-13x-15, find f(3)-f(0)
33
Evaluate the limit:
Lim x→2 (x2-4)/(x-2)
4
Does the series converge or diverge?
∞
∑ n!/2n
n=1
Diverges
I would like to increase power in my study by decreasing variability in the data, so I should change this.
Sample Size
simplify:
sinx+sinxcot²x
cscx
Find:
d/dx (x3ex)
3x2ex+x3ex
Find dy/dx:
x2+y2=25
dy/dx=-x/y
Suppose 80% of jurors come to a just decision. In a jury of six people, what is the probability more than half come to a just decision?
A) .09888 B) .34464 C) .8 D) .90112 E) .98304
D) .90112
Solve for x:
√(log3x) = 2
81
Compute ∫3x2sin(x)dx
-3x2cos(x)+6xsin(x)-6cos(x)+C
Determine the interval of convergence for the power series:
∞
∑ xn/n
n=1
(−1,1]
You should be cautious interpreting chi-squared results if any of the cells are smaller than this number
5
Find vertical asymptotes:
f(x) = (4x²+3x-1)/(2x²-5x+7)
x=2
Evaluate the limit:
lim x->0 (sin(5x))/x
5
Find the Maclaurin series for:
f(x) = 1/(1+x3)
∞
∑ (-1)nx3n
n=0
A researcher is conducting a study looking at the relation between number of books a person has in their house and their self-reported rating of preference for reading on a 1-5 scale. What test should they run?
Spearman's Correlation
Solve for x:
4x + 4(x+1) =72
x=2
Solve the differential equation:
dx/dy + y = xe-x, y(0)=1
y=e-x((x2/2)+1)
Lim x→𝝅 (cosx+sin(2x)+1)/(x2-𝝅2)
1/𝝅
Suppose the average score on a national exam is 500 with a standard deviation of 100. If each score is increased by 20 and the result is increased by 10 percent, what are the new mean and standard deviation?
A) mean = 570, standard dev. = 100 B) mean = 570, standard dev. = 110 C) mean = 572, standard dev. = 100 D) mean = 572, standard dev. = 110 E) mean = 572, standard dev. = 132
D) mean = 572, standard dev. = 110