A random serving of enrollment at 20 community colleges across the United States yielded the following figures 21,877; 2,045; 9,414; 7,681; 3,200; 17,500; 9,200; 7,380; 18,314; 6,557; 13,713; 17,768; 7,493; 2,771; 2,861; 1,263; 7,285; 28,165; 5,080; 11,712. a) i. x= ii. Sx=  iii. n=  iv. n-1=  b) define the random variables X and (-)X

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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A random serving of enrollment at 20 community colleges across the United States yielded the following figures

21,877; 2,045; 9,414; 7,681; 3,200; 17,500; 9,200; 7,380; 18,314; 6,557; 13,713; 17,768; 7,493; 2,771; 2,861; 1,263; 7,285; 28,165; 5,080; 11,712.

a) i. x=

ii. Sx= 

iii. n= 

iv. n-1= 

b) define the random variables X and (-)X

c) which distribution should you use for this problem? 

D) contstruct a 90% confidence interval for the population mean enrollment at community colleges in the United States. 
Enter your answer in interval notation. Round your answer to the nearest integer.

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