225 results for "sample".
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Question in Content created by Newcastle University
Find a regression equation.
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Question in Content created by Newcastle University
Given sample data find mean, standard deviation, median, interquartile range,
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Question in Content created by Newcastle University
The human resources department of a large finance company is attempting to determine if an employee’s performance is influenced by their undergraduate degree subject. Personnel ratings are used to judge performance and the task is to use expected frequencies and the chi-squared statistic to test the null hypothesis that there is no association.
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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
Sample of size $24$ is given in a table. Find sample mean, sample standard deviation, sample median and the interquartile range.
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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
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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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 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
Three parts. A sample of size $n$ is taken from $N$ where $k$ of the items are known to be defective and the task is to find the probability that more than $m$ defectives are in the sample. First part is sampling with replacement (binomial), second is sampling without replacement, (hypergeometric) and the last part uses the Poisson approximation to the first part.
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Question in Content created by Newcastle University
An experiment is performed twice, each with $5$ outcomes
$x_i,\;y_i,\;i=1,\dots 5$ . Find mean and s.d. of their differences $y_i-x_i,\;i=1,\dots 5$.
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Question in Content created by Newcastle University
Given two sets of data, sample mean and sample standard deviation, on performance on the same task, make a decision as to whether or not the mean times differ. Population variance not given, so the t test has to be used in conjunction with the pooled sample standard deviation.
Link to use of t tables and p-values in Show steps.
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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
Provided with information on a sample with sample mean and known population variance, use the z test to either accept or reject a given null hypothesis.
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Question in Content created by Newcastle University
Topics covered are calculating the mean, median, mode, range, and standard deviation.
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Question in Transition to university
This question provides a list of data to the student. They are asked to find the mean, median, mode and range.
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Question in Ioannis's workspace
This question provides a list of data to the student. They are asked to find the mean, median, mode and range.
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Question in Leonardo's workspace
Find mean, SD, median and IQR for a sample.
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Question in James's workspace
Find the modes of two small samples.
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Question in James's workspace
Compute the means of two small samples.
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Question in Charlie's workspace
Topics covered are calculating the mean, median, mode, range, and standard deviation.
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Question in John's workspace
Topics covered are calculating the mean, median, mode, range, and standard deviation.
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Question in HSS8005
No description given
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Question in Statistics
Compute the standard error of a sample mean, given the sample size and standard deviation.
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Question in Statistics
Find the modes of two small samples.
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Question in Statistics
Calculate the mean, range, and variance of a small sample.
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Question in Statistics
Template question. The student is asked to perform a two factor ANOVA to test the null hypotheses that the measurement does not depend on each of the factors, and that there is no interaction between the factors.
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Question in Statistics
Template question. The student is asked to perform a two factor ANOVA to test the null hypotheses that the measurement does not depend on each of the factors, and that there is no interaction between the factors.