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10) (a) In a hypothesis testing procedure explain the difference between a type 1 and type...

10) (a) In a hypothesis testing procedure explain the difference between a type 1 and type 2 error (b) Explain the difference between a point estimate and an interval estimate? What is a confidence interval? (c) A poll service indicates that 74% of the public is opposed to a certain piece of legislation but there is a 95% margin of sampling error of 3.1%. Express these findings as a confidence interval. (d) You read in the paper that in a random sample of 80 voters 35% favored Perot. Construct a 95% confidence interval. What does this show about statistical results for proportions? (e) Two industrial procedures are compared. The null hypothesis is that they’re equal the alternative is that A is better than B. If the sample results are significant what can we conclude? (f) The EPA wants to test whether a parcel of water is fit to drink. The null hypopthesis is that the water is clean the alternative is that its dirty. If the results are significant should the EPA allow this water to be drunk? why? (g) A hypothesis test is conducted at a 5% level of significance. What is the probability of incorrectly rejecting the null hypothesis? (h) What is the consumer’s risk in an acceptance sampling situation?

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