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Suppose a geyser has a mean time between eruptions of 91 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 28 minutes. Complete parts (a) through (e) below. (a) What is the probability that a randomly selected time interval between eruptions is longer than 104 minutes? The probability that a randomly selected time interval is longer than 104 minutes is approximately (Round to four decimal places as needed.) (b) What is the probability that a random sample of 9 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 9 time intervals is more than 104 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 25 time intervals is more than 104 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 population mean less than 104 minutes, then the probability that the sample mean of the time between eruptions is greater than 104 minutes V because the variability in the sample mean as the sar (e) What might you conclude if a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? Select all that apply. O A. The population mean is 91, and this is an example of a typical sampling result. O B. The population mean cannot be 91, since the probability is so low.

Suppose a geyser has a mean time between eruptions of 91 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 28 minutes. Complete parts (a) through (e) below. (a) What is the probability that a randomly selected time interval between eruptions is longer than 104 minutes? The probability that a randomly selected time interval is longer than 104 minutes is approximately (Round to four decimal places as needed.) (b) What is the probability that a random sample of 9 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 9 time intervals is more than 104 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 25 time intervals is more than 104 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 population mean less than 104 minutes, then the probability that the sample mean of the time between eruptions is greater than 104 minutes V because the variability in the sample mean as the sar (e) What might you conclude if a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? Select all that apply. O A. The population mean is 91, and this is an example of a typical sampling result. O B. The population mean cannot be 91, since the probability is so low.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Suppose a geyser has a mean time between eruptions of 91 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 28 minutes. Complete parts (a) through (e) below. **(a)** What is the probability that a randomly selected time interval between eruptions is longer than 104 minutes? The probability that a randomly selected time interval is longer than 104 minutes is approximately ____. (Round to four decimal places as needed.) **(b)** What is the probability that a random sample of 9 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 9 time intervals is more than 104 minutes is approximately ____. (Round to four decimal places as needed.) **(c)** What is the probability that a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 25 time intervals is more than 104 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 population mean is less than 104 minutes, then the probability that the sample mean of the time between eruptions is greater than 104 minutes ____ because the variability in the sample mean ____ as the sample size ____. **(e)** What might you conclude if a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? Select all that apply. - ☐ A. The population mean is 91, and this is an example of a typical sampling result. - ☐ B. The population mean cannot be 91, since the probability is so low. - ☐ C. The population mean may be less than 91. - ☐ D. The population mean may be greater than 91. - ☐ E. The population mean must be more than 91, since the probability is so low. - ☐ F. The population mean is 91, and this is just a rare sampling. - ☐ G. The population mean must be less than 91, since the probability is so low.
Transcribed Image Text:Suppose a geyser has a mean time between eruptions of 91 minutes. Let the interval of time between the eruptions be normally distributed with standard deviation 28 minutes. Complete parts (a) through (e) below. **(a)** What is the probability that a randomly selected time interval between eruptions is longer than 104 minutes? The probability that a randomly selected time interval is longer than 104 minutes is approximately ____. (Round to four decimal places as needed.) **(b)** What is the probability that a random sample of 9 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 9 time intervals is more than 104 minutes is approximately ____. (Round to four decimal places as needed.) **(c)** What is the probability that a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? The probability that the mean of a random sample of 25 time intervals is more than 104 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 population mean is less than 104 minutes, then the probability that the sample mean of the time between eruptions is greater than 104 minutes ____ because the variability in the sample mean ____ as the sample size ____. **(e)** What might you conclude if a random sample of 25 time intervals between eruptions has a mean longer than 104 minutes? Select all that apply. - ☐ A. The population mean is 91, and this is an example of a typical sampling result. - ☐ B. The population mean cannot be 91, since the probability is so low. - ☐ C. The population mean may be less than 91. - ☐ D. The population mean may be greater than 91. - ☐ E. The population mean must be more than 91, since the probability is so low. - ☐ F. The population mean is 91, and this is just a rare sampling. - ☐ G. The population mean must be less than 91, since the probability is so low.
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