Describe hypothesis testing for population proportions

Reference no: EM132408668

Question 1. It is commonly known that approximately 10% of the population is left-handed. Nike Golf would like to estimate the proportion of left-handed golfers in order to plan the schedule of golf club production. Assume Nike collected a sample of 200 golfers. What is the probability that more than 12% of the golfers in the sample are left-handed?

Question 2. What is the difference between a one- and two-tail hypothesis test on a population?

Question 3. Describe hypothesis testing for population proportions with regards to the p-value.

Question 4. According to the Mortgage Bankers Association, 10.73% of prime fixed-rate mortgages were in foreclosure or delinquent in the United States during the first quarter of 2010. To validate this claim, a random sample of 700 mortgages was selected, of which 98 were in foreclosure or delinquent. Using a 90% confidence interval, does this sample support the findings of the Mortgage Bankers Association?

Question 5. This is a 40 marks questions. Make sure your answer should justify 40 marks. Write an essay on four ways that researchers can collect samples for research studies.

Write 5 or more paragraph response. Your response should have 1400-1600 or more words.

Question 6. What is the p-value equivalent to with regards to hypothesis testing?
Select one:
a. Alternate hypothesis
b. Null hypothesis
c. Critical value
d. Observed level of significance

Question 7. How can survey questions lead to non-sampling errors?

Question 8. What does the confidence interval tells us about a sample's mean?

Question 9. What is meant by a 90% confidence level?

Question 10. In July 2010, a survey conducted by Webroot, a software security firm, found that 32% of the respondents use the same password for all of the social networking web sites they log on to (which, by the way, is not the best idea). Suppose a follow-up survey was conducted in late 2010 to investigate if the proportion had changed. Out of a random sample of 225 Internet users, it was found that 86 used the same password for all their social networking web sites. State the null and alternative hypothesis.

Question 11. How can cluster sampling be considered like a convenience sampling?

Reference no: EM132408668

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