Assignment:
1. Determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution, Student t distribution or neither. The sample data appear to come from a normally distributed population with ? = 28. Explain.
Claim: = 977.
Sample data: n = 25, x ? = 984, s = 25. Explain.
2. In a sample of 100 M&M's, it is found that 8% are brown. Use a 0.05 significance level to test the claim that of the Mars candy company that the percentage of brown M&M's is equal to 13%. Identify the null and alternative hypotheses.
3. Find the test statistic.
4. Use the Standard Normal Table to find the p-value, critical value and state the decision about the null hypothesis.
5. State the conclusion in non-technical terms.
6. Test the claim that for the adult population of one town, the mean annual salary is given by ? = 30,000. Sample data are summarized as n = 17, = $22,298, and s = $14,200. Use a significance level of ? = 0.05. State the null and alternative hypotheses.
7. Find the test statistic.
8. Find the critical value and state decision about null hypothesis.
9. State the conclusion in non-technical terms.
10. Find the critical value or values of ?2 based on the given information. H1: ? > 26.1, n = 9, ? = 0.01