460 results.
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Question in Content created by Newcastle University
Four questions on finding least upper bounds and greatest lower bounds of various sets.
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Question in Content created by Newcastle University
xn=nktn where k is a positive integer and t a real number with 0<t<1. Find the smallest integer N such that (m+1)ktm+1≤mktm for all m≥N.
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
Given data on population mean and population standard deviation and three sampling sizes, calculate the probabilities that the sample means are within a specified distance from the population mean.
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Question in Content created by Newcastle University
Given mean and sd of 1000 sample returns on a scale of 1 to 7 together with a given score, find the z-score.
Also find the 95% confidence interval for the population mean.
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
Minitab was used to fit an AR(1) model to a stationary time series. Given the output answer the following questions about the model and use the model to make forecasts.
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Question in Content created by Newcastle University
Minitab was used to fit both an AR(1) model and an AR(2) to a stationary series. A table is given summarising the results obtained from Minitab. Choose the most appropriate model and make a forecast based on that model.
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Question in Content created by Newcastle University
A multiple linear regression model of the form:
Y=β0+β1X1+β2X2+β3X3+β4X4+ϵ
is fitted to some data in Minitab which generates a table showing estimates of the parameters with associated p-values. Determine which variable to exclude first.
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Question in Content created by Newcastle University
Find a regression equation given 12 months data on temperature and sales of a drink.
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Question in Content created by Newcastle University
Deciding whether or not three sampling methods are simple random sampling, stratified sampling, systematic or judgemental sampling.
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Question in Content created by Newcastle University
Asking users to interpret a minitab output to give the coefficients of a multiple regression together with a prediction based on the subsequent equation.
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Question in Content created by Newcastle University
A graphical approach to aiding students in writing down a formal proof of discontinuity of a function at a given point.
Uses JSXgraph to sketch the graphs and involves some interaction/experimentation by students in finding appropriate intervals.
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
Approximating integral of a quadratic by Riemann sums . Will include an interactive graph in Advice showing the approximations given by the upper and lower sums and how they vary as we increase the number of intervals.
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Question in Content created by Newcastle University
Approximating integral of a quadratic by Riemann sums . Includes an interactive graph in Advice showing the approximations given by the upper and lower sums and how they vary as we increase the number of intervals.
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Question in Content created by Newcastle University
No description given
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Question in Content created by Newcastle University
Given 3 observations from a Poisson(μ) distribution find the likelihood, the log likelihood and the MLE for μ.
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Question in Content created by Newcastle University
Given a linear combination Y of three independent random variables with given means and variances, find the mean of variance of Y.
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Question in Content created by Newcastle University
Given a PDF f(x) on the real line with unknown parameter t and three random observations, find log-likelihood and MLE ˆt for t.
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Question in Content created by Newcastle University
Using a random sample from a population with given mean and variance, find the expectation and variance of three estimators of μ. Unbiased, efficient?
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Question in Content created by Newcastle University
Given sum of sample from a Normal distribution with unknown mean μ and known variance σ2. Find MLE of μ and one of four functions of μ.
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Question in Content created by Newcastle University
Given a discrete random variable X find the expectation of 1/X and eX.
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Question in Content created by Newcastle University
Arrivals given by exponential distribution, parameter θ and Y, sample mean on inter-arrival times. Find and calculate unbiased estimator for θ.
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Question in Content created by Newcastle University
Entering numbers in Numbas, Part 1.
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Question in Content created by Newcastle University
LSD and Tukey yardsticks on five treatments. Also two-way Anova test on same set of data.
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Question in Content created by Newcastle University
Details on inputting numbers into Numbas.