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The average life of an electric rice cooker is 5 years, with a standard deviation of 1 year. Assume the lives of these cookers follow a normal distribution. Find a. The probability that the mean life of a random sample of 9 machines falls between 5.7 and 8.1 years. (Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 1% b. The value of to the left of which 85% of the means computed from random samples of size 9 would fall.(Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 2% Blank 1 Add your answer Blank 2 Add your answer

The average life of an electric rice cooker is 5 years, with a standard deviation of 1 year. Assume the lives of these cookers follow a normal distribution. Find a. The probability that the mean life of a random sample of 9 machines falls between 5.7 and 8.1 years. (Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 1% b. The value of to the left of which 85% of the means computed from random samples of size 9 would fall.(Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 2% Blank 1 Add your answer Blank 2 Add your answer

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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The average life of an electric rice cooker is 5 years, with a standard deviation of 1 year. Assume the lives of these cookers follow a normal distribution. Find

 

a. The probability that the mean life of a random sample of 9 machines falls between 5.7 and 8.1 years. (Answer in percent with 2 decimal places. No need to include the percent symbol)

Answer: Blank 1%

 

b. The value of to the left of which 85% of the means computed from random samples of size 9 would fall.(Answer in percent with 2 decimal places. No need to include the percent symbol)

Answer: Blank 2%

The average life of an electric rice cooker is 5 years, with a standard deviation of 1 year. Assume the lives of these cookers follow a normal distribution. Find a. The probability that the mean life of a random sample of 9 machines falls between 5.7 and 8.1 years. (Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 1% b. The value of to the left of which 85% of the means computed from random samples of size 9 would fall.(Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 2% Blank 1 Add your answer Blank 2 Add your answer
Transcribed Image Text:The average life of an electric rice cooker is 5 years, with a standard deviation of 1 year. Assume the lives of these cookers follow a normal distribution. Find a. The probability that the mean life of a random sample of 9 machines falls between 5.7 and 8.1 years. (Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 1% b. The value of to the left of which 85% of the means computed from random samples of size 9 would fall.(Answer in percent with 2 decimal places. No need to include the percent symbol) Answer: Blank 2% Blank 1 Add your answer Blank 2 Add your answer
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