Question: The student body at many community colleges is considered a "commuter population".  The students activities office wishes to know "how far(one way) does the average  community college student commute each day?"  A random sample of 100 commuting students was identified and their one-way distances obtained.  The resulting sample mean distance was 10.22 miles .  Use sigma = 6 and estimate the mean one-way distance commuted by all commuting students using :
a. a point estimate
b.  a 95% confidence interval
c.  find the margin of sampling error
d.  find the length of the confidence interval

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