SCI1020 Lecture 8: Part 3c Introduction to inference
22 Dec 2018
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Take a random sample to test it the hypothesised population value is correct or not, wit. Is the population really what we thought it to be. Confidence interval tells you what you believe the value to be while a hypothesis tells y. How likely would it be to see the results we saw in the sample if the population claim of. Do the data give evidence against the claim. The probability of the sample answer or more extreme if the population value is still th thought. If p-value is low maybe previous thought not correct. Variable has a normal distribution in the population or if skewed population is large en. Although the mean is unknown, the standard deviation is known. The four steps in carrying out a significance test: State the null and the alternative hypothesis. (the alternative is how things have change. Check conditions and then calculate the test statistic based on the evidence presented i.
