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A. The probability P (x27.7) This = B. The probability P (x≥7.7) = This

A. The probability P (x27.7) This = B. The probability P (x≥7.7) = This

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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According to a study, children ranging from ages 8 to 18 averaged 6.8 hours per day using electronic media. Assume the population standard deviation is 2.3 hours per day. A random sample of 35 children from this age group was selected, with a sample average of 7.7 hours of electronic media use per day. Complete parts a and b below. a. Is there support for the claim of the study using the criteria that the sample average of 7.7 hours falls within the symmetrical interval that includes 95% of the sample means if the true population mean is 6.8 hours? Select the correct choice below and fill in the answer box within your choice. (Type an integer or decimal rounded to four decimal places as needed.) This indicates that the sample average of 7.7hours falls within the 95% symmetrical interval, supporting the claim of the study. OA. The probability P (x≥7.7): OB. The probability P (x≥7.7) = This indicates that the sample average of 7.7hours falls outside the 95% symmetrical interval, contradicting the claim of the study.
Transcribed Image Text:According to a study, children ranging from ages 8 to 18 averaged 6.8 hours per day using electronic media. Assume the population standard deviation is 2.3 hours per day. A random sample of 35 children from this age group was selected, with a sample average of 7.7 hours of electronic media use per day. Complete parts a and b below. a. Is there support for the claim of the study using the criteria that the sample average of 7.7 hours falls within the symmetrical interval that includes 95% of the sample means if the true population mean is 6.8 hours? Select the correct choice below and fill in the answer box within your choice. (Type an integer or decimal rounded to four decimal places as needed.) This indicates that the sample average of 7.7hours falls within the 95% symmetrical interval, supporting the claim of the study. OA. The probability P (x≥7.7): OB. The probability P (x≥7.7) = This indicates that the sample average of 7.7hours falls outside the 95% symmetrical interval, contradicting the claim of the study.
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