Use the following prompt to answer the questions below.

A study conducted at Manatee Community College revealed that students who attended class 95 to 100% of the time usually received an A in the class. Students who attended class 80 to 90% usually received a B or C in the class. Students who attended class less than 80% of the time usually received a D or an F or eventually withdrew from the class.

Based on this information, the researchers claim that attendance and grades are related. The more you attend class, the more likely it is that you will receive a higher grade. If you improve your attendance, your grades will probably improve. Many factors affect your grades in a course. However, one factor that you have considerable control over is attendance. You can increase your opportunities for learning by attending class more often.

1- What variable is under study?

2-Which type of statistics is being used?

3- What is the population under study?

4-Was a sample collected? if so, from where?

Part 2

For a spots radio talk show, you are asked to research the question whether more home runs are hit by players in the National League or by players in the American League. You decide to use the home run leaders from each league for a 40-year period as your data. The numbers are shown in the chart.

National League :47 49 73 50 65 70 49 47 40 43 46 35 38 40 47 39 49 37 37 36 40 37 31 48 48 45 52 38 38 36 44 40 48 45 45 36 39 44 52 47

American League: 47 57 52 47 48 56 56 52 50 40 41 46 43 44 51 36 42 49 49 40 43 39 39 22 45 46 39 32 36 32 32 32 37 33 44 49 44 44 49 32

1-Define the population.

2-Determine the type of sample that was used? Justify your answer

3-Statement the alternative hypothesis.

4-Which statistical test will you use?

5-Assume that you test the hypothesis at a 0.05 level of significance and the p-value is 0.067. What decision will be made about the hypothesis.