A recent article in a college newspaper stated that college students get an average of 5.5 hours of sleep each night. A student who was skeptical about this value decided to conduct a survey by randomly sampling 25 students.

1) Write the skeptical student's null hypothesis in words.

2) Write the skeptical student's alternative hypothesis in words.

3) Write the skeptical student's null hypothesis in mathematical symbols.

4) Write the skeptical student's alternative hypothesis in mathematical symbols.

Caleb looks at his quiz scores. N = {89, 93, 88, 92, 35, 99, 87, 43, 27, 95}

Which statistic best describes the central tendency of Caleb's scores? Why?