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The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale. After completing the scale, the participants were shown a 20-minute campaign film in favor of the candidate, and then they completed the likability scale a second time. The scores on the likability scale range from 20 to 100, with higher scores indicating more favorable attitudes toward the candidates.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
Illustrate what does weighting add to usefulness of moving averages and explain how is it done. The yield on a thirty year treasury note at the end of every year since 1990 is recorded below.
The mean of a normal probability distribution is 60; the standard deviation is 5.
Richard is one of test takers. Find out the number of questions he can expect to get right on test by random guessing.
Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).
If the rods' lengths produced by your line are normally distributed, with a mean equal to the target of 0.2 meters, and a standard deviation of 0.015m, what percentage of rods will be scrapped?
Explain the logic of what you have done, writing as if you are speaking to someone who has never heard of correlation (but who does understand the mean, deviation scores, and hypothesis testing);
Intersection of two mutually exclusive events: can be any value between 0 to 1, must always be equal to 1.
FBI Report do greater universities that tend to have more property crime. Keep a scatter diagram also sketch the line you think best fits the data.
P-value to test hypotheses,
Compute the sample variance and sample standard deviation as a measure of volatility of monthly total return for Chevron (to 2 decimals): Sample variance and Sample standard deviation.
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