Question: For a random sample of twenty-five students from a large class, the accompanying table shows the amounts of time spent studying for a test. STUDY

For a random sample of twenty-five students from a large class, the accompanying table shows the amounts of time spent studying for a test. STUDY TIME (HOURS) NUMBER OF STUDENTS

(a) Draw the histogram. 04 48 8-12 12-16 16-20 3 7 8 5 2

(b) Find the relative frequencies.

(c) Find the cumulative relative frequencies and draw the corresponding histogram.

(d) Estimate the sample mean study time.

(e) Estimate the sample standard deviation.

(f) In which class is the sample median? (g) Which is the modal class?

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