Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 23 minutes. A researcher observed 14 students who entered the library to study. Round all answers to 4 decimal places where possible. What is the distribution of XX? XX ~ N(,) What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) What is the distribution of ∑x∑x? ∑x∑x ~ N(,) If one randomly selected student is timed, find the probability that this student's time will be between 42 and 50 minutes

Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 42 minutes and standard deviation 22 minutes. A researcher observed 18 students who entered the library to study. Round all answers to 4 decimal places where possible. What is the distribution of XX? XX ~ N(,) What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) What is the distribution of ∑x∑x? ∑x∑x ~ N(,) If one randomly selected student is timed, find the probability that this student's time will be between 40 and 47 minutes.  For the 18 students, find the probability that their average time studying is between 40 and 47 minutes.  Find the probability that the randomly selected 18 students will have a total study time more than 684 minutes.  For part e) and f), is the assumption of normal necessary? -No    -Yes The top 10% of the total study time for groups of 18 students will be given a sticker that says "Great dedication". What is the least total time that a group…

suppose that IQ scores and one region are normally distributed with a standard deviation of 16. Suppose also that exactly 55% of the individuals from this region have IQ scores of greater than 100 ( and at 45% do not ). What is the main IQ score for this region carrier intermediate confusions to at least four decimal places around your answer to at least one decimal place.

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Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 23 minutes. A researcher observed 14 students who entered the library to study. Round all answers to 4 decimal places where possible. If one randomly selected student is timed, find the probability that this student's time will be between 42 and 50 minutes. For the 14 students, find the probability that their average time studying is between 42 and 50 minutes. Find the probability that the randomly selected 14 students will have a total study time less than 714 minutes.

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