Please help with this stat math question.

Please help explain what this data tells you about this question: How many hours of sleep does an average high school student in their junior year get each night? What generalizations might you draw about the population from which the sample was drawn (population proportion)? Please also explain if the data is discrete or continuous? Do you see any bias that might have been included in either the sample selection or questioning method? The sample method is Convenience: sample is students in classroom all juniors. Did the shape of your data not approximate a normal distribution

A pictue of the frequncy histogram is below.

Frequency Table Value Frequency 4 3 (11.538461538462%) 5 7 (26.923076923077%) Frequency 3 6 8 (30.769230769231%) 7 8 (30.769230769231%) 2 41 6 10 Hours of sleep Mean: 5.807 Standard D: 1.0 Margin Of ERROR: 5.8077 + 0.323 ( +5.56%) ( 90% conf )