6501 results.
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Question in Content created by Newcastle University
Two ordered data sets, each with 10 numbers. Find the sample standard deviation for each and for their sum.
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Question in Content created by Newcastle University
Multiple correlation question. Given the correlation coefficent of $Y$ with $X_1$ is $r_{01}$, the correlation coefficent of $Y$ with $X_2$ is $r_{02}$ and the correlation coefficent of $X_1$ with $X_2$ is $r_{12}$ then explain the proportion of variablity of $Y$. Also find the partial corr coeff between $Y$ and $X_2$ after fitting $X_1$ and find how much of the remaining variability in $Y$ is explained by $X_2$ after fitting $X_1$.
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Question in Content created by Newcastle University
Multiplication of $2 \times 2$ matrices.
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Question in Content created by Newcastle University
Very elementary matrix multiplication.
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Question in Content created by Newcastle University
Provided with information on a sample with sample mean and standard deviation, but no information on the population variance, use the t test to either accept or reject a given null hypothesis.
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Question in Content created by Newcastle University
Two ordered data sets, each with 10 numbers. Find the sample standard deviation for each and for their sum.
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Exam (13 questions) in Content created by Newcastle University
Questions on matrix arithmetic.
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Exam (9 questions) in Content created by Newcastle UniversityQuestions used in a university course titled "Methods for solving differential equations"
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Exam (1 question) in Content created by Newcastle University
Statistics and probability. One question on multiple and partial correlation.
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Question in Content created by Newcastle University
Given a random variable $X$ normally distributed as $\operatorname{N}(m,\sigma^2)$ find probabilities $P(X \gt a),\; a \gt m;\;\;P(X \lt b),\;b \lt m$.
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Question in Content created by Newcastle University
Converting odds to probabilities.
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Question in Content created by Newcastle University
Question on $\displaystyle{\lim_{n\to \infty} a^{1/n}=1}$. Find least integer $N$ s.t. $\ \left |1-\left(\frac{1}{c}\right)^{b/n}\right| \le10^{-r},\;n \geq N$
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Question in Content created by Newcastle University
Normal distribution $X \sim N(\mu,\sigma^2)$ given. Find $P(a \lt X \lt b)$. Find expectation, variance, $P(c \lt \overline{X} \lt d)$ for sample mean $\overline{X}$.
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Question in Content created by Newcastle University
Given a large number of gambles, find the expected profit.
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Question in Content created by Newcastle University
Let $x_n=\frac{an+b}{cn+d},\;\;n=1,\;2\ldots$. Find $\lim_{x \to\infty} x_n=L$ and find least $N$ such that $|x_n-L| \le 10^{-r},\;n \geq N,\;r \in \{2,\;3,\;4\}$.
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Question in Content created by Newcastle University
Seven standard elementary limits of sequences.
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Question in Content created by Newcastle University
Given 32 datapoints in a table find their minimum, lower quartile, median, upper quartile, and maximum.
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Question in Content created by Newcastle University
Using simple substitution to find $\lim_{x \to a} bx+c$, $\lim_{x \to a} bx^2+cx+d$ and $\displaystyle \lim_{x \to a} \frac{bx+c}{dx+f}$ where $d\times a+f \neq 0$.
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Question in Content created by Newcastle University
$A$ a $3 \times 3$ matrix. Using row operations on the augmented matrix $\left(A | I_3\right)$ reduce to $\left(I_3 | A^{-1}\right)$.
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Question in Content created by Newcastle University
Find the first 3 terms in the MacLaurin series for $f(x)=(a+bx)^{1/n}$ i.e. up to and including terms in $x^2$.
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Exam (8 questions) in Content created by Newcastle University
Questions about the limits of sequences from a first year pure maths course.
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Exam (2 questions) in Content created by Newcastle University
Solve a linear programming problem, and perform sensitivity analysis.
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Exam (2 questions) in Content created by Newcastle University
Find the first few terms of the Maclaurin and Taylor series of given functions.
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Question in Content created by Newcastle University
Kruskal-Wallis test with ties.
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Question in Content created by Newcastle University
Find (hyperbolic substitution):
$\displaystyle \int_{b}^{2b} \left(\frac{1}{\sqrt{a^2x^2-b^2}}\right)\;dx$ -
Question in Content created by Newcastle University
Calculate definite integrals: $\int_0^\infty\;e^{-ax}\,dx$, $\int_1^2\;\frac{1}{x^{b}}\,dx$, $\; \int_0^{\pi}\;\cos\left(\frac{x}{2n}\right)\,dx$
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Question in Content created by Newcastle University
Evaluate $\int_1^{\,m}(ax ^ 2 + b x + c)^2\;dx$, $\int_0^{p}\frac{1}{x+d}\;dx,\;\int_0^\pi x \sin(qx) \;dx$, $\int_0^{r}x ^ {2}e^{t x}\;dx$
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Question in Content created by Newcastle University
Find $\displaystyle \int \sin(x)(a+ b\cos(x))^{m}\;dx$
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Question in Content created by Newcastle University
Find $\displaystyle \int \frac{c}{\sqrt{a-bx^2}}\;dx$. Solution involves the inverse trigonometric function $\arcsin$.
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Question in Content created by Newcastle University
Find $\displaystyle\int \frac{ax^3-ax+b}{1-x^2}\;dx$. Input constant of integration as $C$.