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Construct the $3 \times 2$ matrix whose elements are given by $a_{i j}=\frac{i}{j}$
answered
4 hours
ago
in
Mathematics

2
views
construct
matrix
elements
real
0
like
0
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construct the $2 \times 3$ matrix whose elements are given by $a_{i j}=ij$
answered
4 hours
ago
in
Mathematics

2
views
sequence
real
analysis
equations
approximation
epsilon
proof
0
like
0
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Construct $2 \times 2$ matrix $\left[a_{i j}\right]$ whose elements are given by
answered
4 hours
ago
in
Mathematics

2
views
real
sequence
analysis
approximation
proof
epsilon
equations
0
like
0
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If a matrix 18 elements what is the possible order it can have?
answered
4 hours
ago
in
Mathematics

2
views
matrix
product
order
determinant
simultaneous
equations
system
0
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0
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If a matrix 8 elements what is the possible order it can have ?
answered
4 hours
ago
in
Mathematics

2
views
matrix
order
product
determinant
simultaneous
equations
system
0
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0
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Write the elements of $a_{13}, a_{21}, a_{33}, a_{24}, a_{23}$
answered
4 hours
ago
in
Mathematics

2
views
sequence
matrix
order
prove
numbers
0
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0
dislike
What is a skewsymmetric matrix?
answered
4 hours
ago
in
Mathematics

2
views
skew
symmetric
matrix
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0
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Define what a symmetric matrix is
answered
4 hours
ago
in
Mathematics

2
views
matrix
symmetric
skew
positive
semidefinite
vectors
eigenvalue
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0
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What is a scalar matrix?
answered
4 hours
ago
in
Mathematics

2
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scalar
matrix
determinant
simultaneous
equations
system
0
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0
dislike
What is a diagonal matrix?
answered
4 hours
ago
in
Mathematics

2
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diagonal
matrix
determinant
simultaneous
equations
system
0
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0
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What is the definition of a matrix?
answered
4 hours
ago
in
Mathematics

2
views
definition
determinant
equations
simultaneous
solution
system
matrix
0
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0
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Are all matrices linear operators?
answered
5 hours
ago
in
Mathematics

2
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matrices
linear
operators
vector
product
1
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0
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What is the relationship between standard deviation and standard variance?
answered
23 hours
ago
in
Data Science & Statistics

13
views
standarddeviation
variance
relationship
statistics
dispersion
calculate
distribution
1
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0
dislike
What is an undercoverage bias?
answered
23 hours
ago
in
Data Science & Statistics

5
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undercoverage
bias
learning
selection
model
artificial
abtesting
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0
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What is a survivorship bias?
answered
23 hours
ago
in
Data Science & Statistics

5
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survivorship
bias
learning
selection
model
artificial
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0
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When creating a statistical model, how do we detect overfitting?
answered
1 day
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in
Data Science & Statistics

6
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model
statistical
overfitting
causal
models
conditioning
adjust
1
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0
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What is the impact of outliers in statistics?
answered
1 day
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in
Data Science & Statistics

5
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statistics
median
mean
range
outlier
data
mode
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Does a symmetric distribution need to be unimodal?
answered
1 day
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in
Data Science & Statistics

6
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symmetric
distribution
normal
examples
gaussian
uniform
curve
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What is the benefit of using box plots?
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1 day
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in
Data Science & Statistics

12
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benefit
box
plots
limitations
statistics
experimental
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0
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What is meant by mean imputation for missing data? Why is it bad?
answered
1 day
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in
Data Science & Statistics

4
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mean
imputation
missing
datascience
0
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0
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What is observational and experimental data in statistics?
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1 day
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in
Data Science & Statistics

4
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observational
experimental
data
statistics
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0
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Where are longtailed distributions used?
answered
1 day
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in
Data Science & Statistics

4
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longtailed
distributions
decision
classification
problems
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0
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The binomial distribution consists of the probabilities of each of the possible numbers of successes on N trials for independent events that each have a probability of Ï€ (the Greek letter pi) of occurring.
answered
1 day
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in
Data Science & Statistics

5
views
probability
independent
events
calculate
mutuallyexclusive
outcomes
random
0
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0
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What is the Binomial Probability Formula?
answered
1 day
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in
Data Science & Statistics

4
views
formula
calculate
probability
interest
eoq
binomial
0
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0
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What is an example of a data set with a nonGaussian distribution?
answered
1 day
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in
Data Science & Statistics

57
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example
data
set
nongaussian
distribution
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0
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What is selection bias?
answered
1 day
ago
in
Data Science & Statistics

26
views
selection
bias
artificial
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0
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What is a statistical interaction?
answered
1 day
ago
in
Data Science & Statistics

3
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statistical
interaction
inference
experiment
survey
table
maths
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0
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What are the assumptions required for linear regression?
answered
1 day
ago
in
Data Science & Statistics

2
views
regression
assumptions
linear
decision
supervised
algorithm
discontinuity
0
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0
dislike
What is linear regression? What do the terms pvalue, coefficient, and rsquared value mean? What is the significance of each of these components?
answered
1 day
ago
in
Data Science & Statistics

2
views
linear
regression
pvalue
coefficient
rsquared
value
mean
0
like
0
dislike
Whatâ€™s the difference between Type I and Type II error?
answered
1 day
ago
in
Data Science & Statistics

23
views
difference
between
type
i
ii
error
0
like
0
dislike
What is sampling? How many sampling methods do you know?
answered
1 day
ago
in
Data Science & Statistics

3
views
sampling
methods
random
0
like
0
dislike
What is the Central Limit Theorem and why is it important?
answered
1 day
ago
in
Data Science & Statistics

29
views
theorem
central
limit
prove
large
numbers
law
0
like
0
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Solve the system, if a is some real number:
answered
2 days
ago
in
Mathematics

4
views
real
number
positive
inequality
fractions
calculate
function
0
like
0
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Find $\mathrm{x}$ and $\mathrm{y}$ from the following system of equations:
answered
2 days
ago
in
Mathematics

4
views
equations
calculus
simultaneous
solution
system
determinant
coefficientmatrix
0
like
0
dislike
Find $\mathrm{x}$ and $\mathrm{y}$ from the following system of equations:
answered
2 days
ago
in
Mathematics

4
views
equations
calculus
simultaneous
solution
system
determinant
coefficientmatrix
0
like
0
dislike
Solve the system: $x \sqrt{5}y=\sqrt{5}$ $xy \sqrt{5}=5$
answered
2 days
ago
in
Mathematics

4
views
solve
calculus
equation
calculate
function
exponents
logarithms
0
like
0
dislike
Solve the system: $$ \begin{aligned} &4 xy=5 \\ &x+2 y=8 \end{aligned} $$
answered
2 days
ago
in
Mathematics

4
views
simultaneous
calculus
determinant
equations
solution
system
coefficientmatrix
0
like
0
dislike
Find the solution for the following linear equation: $1 /(4 x2)=5 / 6$
answered
2 days
ago
in
Mathematics

3
views
equation
circle
vectors
line
prove
radius
trigonometry
0
like
0
dislike
If $a$ and $b$ are real numbers, solve the following equation: $(a+2) xb=2+(a+b) x$
answered
2 days
ago
in
Mathematics

5
views
real
number
inequality
positive
fractions
calculate
function
0
like
0
dislike
Find the solution for the following linear equation: $5 x / 2=(3 x+24) / 6$
answered
2 days
ago
in
Mathematics

7
views
equation
line
vectors
prove
circle
radius
trigonometry
0
like
0
dislike
Solve the linear equation: $3(x+2)2(1x)=4 x+5$
answered
2 days
ago
in
Mathematics

9
views
solve
equations
equation
zimsec
olevel
algebra
calculate
0
like
0
dislike
Solve the linear equation: $x7=3 x9$
answered
2 days
ago
in
Mathematics

4
views
equation
solve
simultaneous
zimsec
olevel
numbers
measure
0
like
0
dislike
Divide $x^{2}y^{2}$ by $xy$
answered
2 days
ago
in
Mathematics

4
views
line
equation
write
point
zero
real
slope
0
like
0
dislike
Divide $x^{3}3 x^{2}+3 x1$ by $x1$
answered
2 days
ago
in
Mathematics

5
views
solve
function
calculate
method
simultaneous
elimination
substitution
0
like
0
dislike
Subtract polynomials $4 x^{3}2 x^{2}10$ and $5 x^{3}+x^{2}+x+5$
answered
2 days
ago
in
Mathematics

6
views
solve
calculate
equations
series
prove
grade12
0
like
0
dislike
Add polynomials $3 x^{2}+2 x+6$ and $x^{2}x1$
answered
2 days
ago
in
Mathematics

4
views
real
numbers
zimsec
number
fractions
answer
questions
0
like
0
dislike
Add the polynomials $\frac{1}{a+b}$ and $\frac{1}{ab}$
answered
2 days
ago
in
Mathematics

4
views
numbers
fractions
number
questions
zimsec
answer
real
0
like
0
dislike
Using the quadratic formula, solve the quadratic equation: $x^{2}9 x+14=0$
answered
2 days
ago
in
Mathematics

5
views
quadratic
formula
solve
equation
completing
method
0
like
0
dislike
Using the factoring method, solve the quadratic equation: $2 x^{2}3 x=0$
answered
2 days
ago
in
Mathematics

4
views
equation
solve
quadratic
square
method
bisection
completing
0
like
0
dislike
Using the quadratic formula, solve the quadratic equation: $x31 / x=0$
answered
2 days
ago
in
Mathematics

4
views
equation
solve
quadratic
square
completing
method
bisection
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