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How do question content and wording, response strategy, and preliminary analysis planning affect question construction? Provide examples of questions that were positively and negatively influenced by these elements.
If you draw one ball from the urn what is the probability that it is blue or white?
How large a sample would be necessary to estimate the population proportion with a margin of error of 0.05 at 95% confidence?
Determine critical value if alpha = 0.05? If p-value for this test is 0.025, this p-value means?
For the sample of men, performance on the simulator task declined by an average of 2.9 points with s = 4.1. Is this a statistically significant change? Use a two-tailed test with = .05.
The frequency distribution below shows the distribution for suspended solid concentration (in PPM) in river water of 50 different waters collected in September 2011.
Obtain a test statistic and p-value. Interpret the results at = .01.
If hypothesis test for single population variance is to be conducted by using significance level of to 0.10, a sample size of n = 16, and test is a one-tailed upper-tail test, the critical value is?
Assume that in a hypothesis test with null hypothesis H 0 : μ = 14.0 at a = 0.05, that a value of 13.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of:
Sample of 36 packages reveals mean weight to be 3.01 pounds, with standard deviation of 0.03 pounds. What is the estimated population mean?
To estimate the mean of the population from sample information, we need to calculate the standard deviation of the distribution of the sample means around the population mean.
A deck of cards is shuffled and then divided into two piles of 26 cards each. We say that a suit is unsplit if all 13 cards of that suit are in the same pile. Compute the probability that at least one suit will be unsplit.
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
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