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Chapter 2: Q.2.35 (page 119)
Two students, John and Ali, from different high schools, wanted to find out who had the highest GPA when compared to his school. Which student had the highest GPA when compared to his school?
John has the better GPA as compared to Ali in his school.
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Use the following information to answer the next six exercises. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars.
Interquartile range (IQR) = _____ 鈥� _____ = _____
Javier and Ercilia are supervisors at a shopping mall. Each was given the task of estimating the mean distance that shoppers live from the mall. They each randomly surveyed shoppers. The samples yielded the following information.
a. How can you determine which survey was correct ?
b. Explain what the difference in the results of the surveys implies about the data.
c. If the two histograms depict the distribution of values for each supervisor, which one depicts Ercilia's sample? How do you know?
d. If the two box plots depict the distribution of values for each supervisor, which one depicts Ercilia鈥檚 sample? How do you know?
Use the following information to answer the next three exercises: We are interested in the number of years students in a particular elementary statistics class have lived in California. The information in the following table is from the entire section.
What is the difference between cumulative relative frequency and relative frequency for each data value?
What does the relative frequency column in Table sum to? Why?
Use the following information to answer the next nine exercises: The population parameters below describe the full-time equivalent number of students (FTES) each year at Lake Tahoe Community College from 1976鈥�1977 through 2004鈥�2005.
鈥� 渭 = 1000 FTES
鈥� median = 1,014 FTES
鈥� 蟽 = 474 FTES
鈥� first quartile = 528.5 FTES
鈥� third quartile = 1,447.5 FTES
鈥� n = 29 years
The population standard deviation = _____
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