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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 1976–1977 through 2004–2005.
μ = 1000 FTES
median = 1,014 FTES
σ = 474 FTES
first quartile = 528.5 FTES
third quartile = 1,447.5 FTES
n = 29 years
94. A sample of 11 years is taken. About how many are expected to have a FTES of 1014 or above? Explain how you determined your answer.
95. 75% of all years have an FTES:
at or below: _____
at or above: _____
96. The population standard deviation = _____
97. What percent of the FTES were from 528.5 to 1447.5? How do you know?
98. What is the IQR? What does the IQR represent?
Sagot :
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