4. A company is interested in evaluating its current inspection procedure for shipments of 50 identical items. The procedure is to take a sample of 5 and pass the shipment if no more than 2 are found to be defective. What proportion of shipments with 20% defectives will be accepted?

11. If the critical value of "t" is 1.812, and significance level "a" is 5% .Find the sample size.

5. The ABC University wants to know the proportion of its football fans travel to away games in the same state. The university took a random sample of 2000 of its football fans and found that 500 of them travel to away games in the state. • Identify the population for this situation. What is the parameter? What is the sample? • Identify the sample statistic. Can the university estimate the population proportion based on the sample? Explain your answer.

32)

6. As a researcher for an environmental agency, you have been asked to determine if the air quality in the Philippines has changed over the past 2 years. You select a random sample of 7 metropolitan cities and find the number of days each year that these cities failed to meet acceptable air quality standards. The results were given below. Can we conclude that after a year, there is no improvement in the air = 0.15. quality in the Philippines? Use a = City Year 1 Year 2 1 18 24 2 50 77 3 9 13 4 22 21 5 30 44 6 29 23 7 1 6

1. A psychologist would like to examine the effects of sugar consumption on the activity level ofpreschool children. On the day of the study, a sample of 10 children does not receive any sugar.Another sample of 10 children is given sugary foods to consume. The psychologist records the activitylevel for each child. A. Single-sample z-testB. Single-sample t-testC. Independent samples t-testD. Related samples t-test (repeated measures or matched samples)E. Correlation

1. Big Blossom Greenhouse was commissioned to develop an extra large rose for the Rose Bowl Parade. A random sample of blossoms from Hybrid A bushes yielded the following diameters (in inches) for mature peak blooms.