Homework Help: statistics

Posted by Scott on Thursday, October 20, 2011 at 2:23pm.

A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal.

a. What proportion of students drank 7 or more cups of coffee per day

b. What proportion of students drank 2 or more cups per day

c. What proportion of students drank between 2 and 7 cups per day

d. How many cups of coffee would an individual at the 60th percentile rank drink?

e. What is the percentile rank for an individual who drinks 4 cups of coffee per day

f. What is the percentile rank for an individual who drinks 7.5 cups of coffee a day?

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