The most famous geyser in the world, Old Faithful in Yellowstone National Park, has a mean time between eruptions of 85 minutes. If the interval of time between the eruptions is normally distributed with standard deviation 21.25 minutes, complete parts (a) through (f). The probability that a randomly selected time interval is longer than 96 minutes is approximately. (Round to four decimal places as needed.) (b) What is the probability that a random sample of 10 time intervals between eruptions has a mean longer than 96 minutes? The probability that the mean of a random sample of 10 time intervals s more than 96 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 24 time intervals between eruptions has a mean longer than 96 minutes? The probability that the mean of a random sample of 24 time intervals is more than 96 minutes is approximately (Round to four decimal places as needed.) (d) What effect does increasing the sample size have on the probability? Provide an explanation for this result. Fill in the blanks below. If the sample size increases, the probability because the variability in the (e) What might you conclude if a random sample of 24 time intervals between eruptions has a mean longer than 96 minutes? Select all that apply. A. The population mean must be less than 85 minutes, since the probability is so low. B. The population mean is 85 minutes, and this is just a rare sampling. C. The population mean is 85 minutes, and this is an example of a typical sampling result. D. The population mean must be more than 85 minutes, since the probability is so low. E. The population mean may be less than 85 minutes. F. The population mean may be greater than 85 minutes. G. The population mean cannot be 85 minutes, since the probability is so low. mean The likelihood the mean length of time between eruptions exceeds minutes is 0.20. (Round to one decimal place as needed.) ▼ (f) On a certain day, suppose there are 28 time intervals for Old Faithful. Treating these 28 eruptions as a random sample, there is a 0.20 likelihood that the mean length of time between eruptions will exceed what value?

The most famous geyser in the world, Old Faithful in Yellowstone National Park, has a mean time between eruptions of 85 minutes. If the interval of time between the eruptions is normally distributed with standard deviation 21.25 minutes, complete parts (a) through (f). The probability that a randomly selected time interval is longer than 96 minutes is approximately. (Round to four decimal places as needed.) (b) What is the probability that a random sample of 10 time intervals between eruptions has a mean longer than 96 minutes? The probability that the mean of a random sample of 10 time intervals s more than 96 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 24 time intervals between eruptions has a mean longer than 96 minutes? The probability that the mean of a random sample of 24 time intervals is more than 96 minutes is approximately (Round to four decimal places as needed.) (d) What effect does increasing the sample size have on the probability? Provide an explanation for this result. Fill in the blanks below. If the sample size increases, the probability because the variability in the (e) What might you conclude if a random sample of 24 time intervals between eruptions has a mean longer than 96 minutes? Select all that apply. A. The population mean must be less than 85 minutes, since the probability is so low. B. The population mean is 85 minutes, and this is just a rare sampling. C. The population mean is 85 minutes, and this is an example of a typical sampling result. D. The population mean must be more than 85 minutes, since the probability is so low. E. The population mean may be less than 85 minutes. F. The population mean may be greater than 85 minutes. G. The population mean cannot be 85 minutes, since the probability is so low. mean The likelihood the mean length of time between eruptions exceeds minutes is 0.20. (Round to one decimal place as needed.) ▼ (f) On a certain day, suppose there are 28 time intervals for Old Faithful. Treating these 28 eruptions as a random sample, there is a 0.20 likelihood that the mean length of time between eruptions will exceed what value?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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