Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 43 minutes and standard deviation 17 minutes. A researcher observed 47 students who entered the library to study. If one randomly selected student is timed, find the probability that this student's time will be between 39 and 43 minutes. For the 47 students, find the probability that their average time studying is between 39 and 43 minutes.  Find the probability that the randomly selected 47 students will have a total study time less than 2162 minutes

Q: If the daily wage of a worker in a large factory has an average of 180 usd, the standard deviation…

A: Given: mean: 180 usd, standard deviation: 5 usd, n = 75.The required probability is…

Q: find the probability that their lengths of pregnancy have a mean that is less than 260 days.

A: Let M denote the mean length of pregnancies for the same of size n = 25.

Q: the average age of ceos is 54 years. assume the random variable is normally distributed. if the…

A: Let X be the random variable from normal distribution with mean (μ) = 54 and standard deviation (σ)…

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A: Given  Mean=μ=880, standard deviation=σ=44  P(X>1000)=?  Nahi te: According to Bartleby…

Q: Suppose the scores on a statistics exam follow a normal distribution with a mean of 70 and a…

A: GivenMean(μ)=70standard deviation(σ)=10

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A:

Q: Assume that the variable is normally distributed, the average time it takes a group of senior high…

A: The normal distribution  in the center is generally denser and basically less dense at tails. There…

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A: The objective of this question is to find the percentage of Asian elephant pregnancies that are…

Q: Suppose that the distribution of touchdown passes (in football) is normally distributed with a mean…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 582 grams and a standard…

A: Obtain the standard z-score for the random variable X equals 548. The standard z-score for the…

Q: Yoonie is a personnel manager in a large corporation. Each month she must review 10 of the…

A: Given Data: μ=4σ=0.9n=10

Q: A factory plant is studying the number of accidents per month. The table below gives the…

A: Note: Hey there! Thank you for posting the question. However, since your question has more than 3…

Q: The height of the dogs in a pet shop is normally distributed with the average height of 25 cm and…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 555 grams and a standard…

A: A particular fruit's weights are normally distributed, with a mean of 555 grams and a standard…

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A: Given that  10 facility  8 administrators  8 committee  We have to find mean and standard deviation…

Q: ores are normally distributed with a mean of 1518 and a standard deviation of 325. If 1 SAT score…

A: Given: μ=1518, σ=325 The corresponding z-value needed to be computed is: If 1 SAT score is randomly…

Q: According to the Bureau of Labor Statistics, the average number of weeks an individual is unemployed…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Assume that newborn girls have birth weights with a mean of 3023 grams and a standard deviation of…

A: Mean(μ)=3023 standard deviation(σ)=714 Sample size(n)=100

Q: according to the government data the probability that a woman between the age of 25 and 29 was never…

A: Given, Probability that a women between the ages of 25 and 29 was never marries is 40%. i.e. p =…

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A: The data is normally distributed. Population mean is μ=25. Population standard deviation is σ=15.

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A: We are given,μ = 196σ = 22n = 60

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A: Sampling Distribution of a Normal Variable : Given a random variable X. Suppose that the population…

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A: From the given information,   Mean= 69.5 Standard deviation = 3.3   The objective is to find the…

Q: The weights of the fish in a certain lake are normally distributed with a mean of 11 lbs. and a…

A: From the provided information, Mean (µ) = 11 Standard deviation (σ) = 12 X~N (11, 12) Here X be a…

Q: A die is rolled nine times, and the number of times at two shows on the upper face is counted. If…

A: given data roll adie nine times count number of times two shows up repeat this experiment many times…

Q: An engineer is going to redesign an ejection seat for an airplane . The seat was designed pilots…

A: (a)   Obtain the probability that his weight is between 120 lb and 161 lb. The probability that…

Q: Yoonie is a personnel manager in a large corporation. Each month she must review 10 of the…

A: a) Define a random variable X, that is the time to review.

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A: Given : A running back on the Spartans football team gains an average of 3.5 yards per carry with a…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.