Next two questions are related                       12 A researcher reports survey results by stating that the margin of error for the 95% middle interval of the sample means is 12.2.  The population variance is assumed to be σ² = 3,200.  The sample size used in this survey is ________.   A 104                     B 83                     C 66                     D 52                                             13 The 90% margin of error for the sampling distribution in the previous question is:                     A 10.2                     B 9.7                     C 9.2                     D 8.7

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Next two questions are related                      
12
A researcher reports survey results by stating that the margin of error for the 95% middle interval of the sample means is 12.2.  The population variance is assumed to be σ² = 3,200.  The sample size used in this survey is ________.
 
A 104                    
B 83                    
C 66                    
D 52                    
                       
13 The 90% margin of error for the sampling distribution in the previous question is:                    
A 10.2                    
B 9.7                    
C 9.2                    
D 8.7                    
           
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