6 results.
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Question in Bill's workspace
Deciding whether or not three sampling methods are simple random sampling, stratified sampling, systematic or judgemental sampling. Also whether or not the method of selection is random, quasi-random or non-random.
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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
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 numbers are drawn at random without replacement from the numbers m to n.
Find the probability that both are odd given their sum is even.
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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
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.