SAT

SAT, 22.06.2019 06:00, cjasmine626

Suppose a random sample of 84 men has a mean foot length of 26.9 cm with a standard deviation of 2.1 cm. what is an 95% confidence interval for this data? question 3 options: question 24 options: 28.58 to 25.22 21.52 to 32.28 24.8 to 29 24.21 to 29.59

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Mathematics, 05.08.2019 04:10, mariateamop

Suppose a random sample of 64 men has a mean foot length of 27.5 cm with a deviation of 2 cm. construct a 95% confidence interval for the mean of the population.

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Mathematics, 29.08.2019 02:30, SophomoreSareke

Suppose a random sample of 84 men has a mean foot length of 26.9 cm with a standard deviation of 2.1 cm. what is an 80% confidence interval for this data?

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Mathematics, 16.10.2019 01:30, Silkyruthie

Suppose a random sample of 84 men has a mean foot length of 26.9 cm with a standard deviation of 2.1 cm. what is an 95% confidence interval for this data? question 3 options: 24.905 to 28.895 24.8 to 29 22.784 to 31.016 21.52 to 32.28

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Mathematics, 23.10.2019 20:50, javier04052000

An electronic device factory is studying the length of life of the electronic components they produce. the manager takes a random sample of 50 electronic components from the assembly line and records the length of life in the life test. from the sample he found the average length of life was 100,000 hours and that the standard deviation was 3,000 hours. he wants to find the confidence interval for the average length of life of the electronic components they produced. based on the information, what advice would you give to him? select one or more: a. the distribution of the length of life of the electronic components is usually right skewed. thus, he should not compute the confidence interval. b. he did not take a simple random sample of the electronic components; thus he should not compute the confidence interval c. the mean and standard deviation are large enough to compute the confidence interval. d. the population is right skewed, but the sample size is large enough to use a normal approximation. thus he can compute the confidence interval. e. he can calculate the confidence interval but should use a t-distribution since it deals with an average.

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