expected value
... “non-significant” correlation, only increasing and decreasing evidence Lack of significance may be due to poorly designed experiment ...
... “non-significant” correlation, only increasing and decreasing evidence Lack of significance may be due to poorly designed experiment ...
What is statistics
... the observed difference by chance, they conclude that they have found a statistically significant difference between the two groups being tested. Two-tailed t-tests are used when the researcher wants to finding out if the results would be interesting in either direction (i.e. if the treatment had a ...
... the observed difference by chance, they conclude that they have found a statistically significant difference between the two groups being tested. Two-tailed t-tests are used when the researcher wants to finding out if the results would be interesting in either direction (i.e. if the treatment had a ...
Lecture note
... 1. Estimate the following statistics for each year: sample mean, median, quantile mean, 5% trimmed mean (low 5 and high 5), 5% winsorized mean. 2. Use the sample mean and sample variance: Test whether or not the mean of the in‡ation rate is equal to 2% for each year. 3. Plot historgram for each year ...
... 1. Estimate the following statistics for each year: sample mean, median, quantile mean, 5% trimmed mean (low 5 and high 5), 5% winsorized mean. 2. Use the sample mean and sample variance: Test whether or not the mean of the in‡ation rate is equal to 2% for each year. 3. Plot historgram for each year ...
Topic 2. Distributions, hypothesis testing, and sample size
... H0: 1=0 (i.e. the parametric mean of the sampled population is equal to some value ). The magnitude of depends not only on the chosen but also on how far the alternative parametric mean is from the parametric mean of the null hypothesis. An important concept in connection with hypothesis test ...
... H0: 1=0 (i.e. the parametric mean of the sampled population is equal to some value ). The magnitude of depends not only on the chosen but also on how far the alternative parametric mean is from the parametric mean of the null hypothesis. An important concept in connection with hypothesis test ...
Homework 5 solutions - 90 total points
... 1 Recall the problem on Exam I about the recall vote for then California governor Gray Davis. An exit poll was taken on 3160 voters. Suppose that 55% of all voters voted for the recall (which was actually the case). a. Identify n and p for the binomial distribution that is the sampling distribution ...
... 1 Recall the problem on Exam I about the recall vote for then California governor Gray Davis. An exit poll was taken on 3160 voters. Suppose that 55% of all voters voted for the recall (which was actually the case). a. Identify n and p for the binomial distribution that is the sampling distribution ...
5.01p, 5.02p, 5.41, 5.42
... Note that both of the sample means above differ somewhat from the population mean of 68. The point of examining a sampling distribution is to be able to see the reliability of a random sample. To do this, you generate many trials — say, 1000 — and look at the distribution of the trials. For example, ...
... Note that both of the sample means above differ somewhat from the population mean of 68. The point of examining a sampling distribution is to be able to see the reliability of a random sample. To do this, you generate many trials — say, 1000 — and look at the distribution of the trials. For example, ...
