Quiz2Spring

# Quiz2Spring - conclusion(continued on back 23 102 42 188 3...

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Name: Statistics and Probability (Math 80) Quiz #2 (Chapter 3 and 4) 1. In order to plan transportation and parking needs at a private high school, administrators asked students how they get to school Some rode a school bus, some rode in with parents or friends, and others used "personal" transportation - bikes, skateboards or just walked. The table summarizes the responses from boys and girls. a. Find each percent: i. What percent of the students are girls who ride the bus? (Show work for partial credit) Bus Ride Personal Total ii. What percent of the girls ride the bus? (Show work for partial credit) iii. What percent of the bus riders are girls? (Show work for partial credit) Male 30 37 19 86 2. Do you think mode of transportation is independent of gender? Give statistical evidence to support your

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Unformatted text preview: conclusion. (continued on back!) Female 34 45 23 102 Total 64 82 42 188 3. A survey conducted in a college intro stats class during Fall 2003 asked students about the number of units they were taking that semester. The number of units for a random sample of 16 students is: 10 10 12 14 15 15 15 15 17 17 19 20. 20 20 20 22 And a histogram for this data is given below: 10 14 18 22 Units a. Find the median number of units. (Show work for partial credit) b. Find the IQR of units. (Show work for partial credit) . Is it more appropriate to use the mean and standard deviation or the median and IQR to summarize these data? (Which is better to use if you had to either meanlstandard deviation OR medianlIQR?) Explain....
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## This note was uploaded on 04/12/2011 for the course STA 215 taught by Professor Tba during the Spring '08 term at Grand Valley State.

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Quiz2Spring - conclusion(continued on back 23 102 42 188 3...

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