Suppose that the number of Facebook friends users have is normally distributed with a mean of 141 and a standard deviation of about 44. Assume eleven individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) --------- , -------- For the group of 11, find the probability that the average number of friends is more than 146. _______ Find the third quartile for the average number of Facebook friends.  Round to 2 decimal places. ______

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard…

A:

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: Five hundred children participated in a field demonstration. Their heights averaged 110cm with a…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a…

A: We have given that,  X be the random variable from standard normal distribution with mean (μ) = 0°C…

Q: According to a recent survey, Americans were expected to spend an average of 985.50 hours watching…

A: Given information is : According to a recent survey, Americans were expected to spend an average of…

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

A: The random variable X is the average of the 49 races. The mean is 142, and standard deviation is 13.…

Q: how much will the probability that the students are aged above 15 years old change?

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Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…

A: given data μ=200σ=9normal distribution P(200<x<225)=?

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

Q: The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution…

A: Let X is the amount of time ( in minutes ) that a randomly selected spouse spends shopping for an…

Q: An electrical firm manufactures light bulbs that have a length of life that is normally distributed…

A: According to the given information, we have Mean = 819 hours Standard deviation = 45 hours

Q: Suppose that the distribution of the scores of students in Statistics Assignment 1 is roughly…

A: GivenMean(μ)=85standard deviation(σ)=5sample size(n)=16

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

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 blood pressure readings are normally distributed with a mean of 123 and a population…

A: Solution: Let X be the blood pressure reading. From the given information, X follows normal…

Q: Suppose that a category of world class runners are known to run a marathon (26 miles) in an average…

A: X¯ ~ N(μx¯ , σx¯) μx¯=μ=142 σx¯=σn=1349=1.86 N = Normal distribution

Q: The length of time it takes college students to find a parking spot in the library parking lot…

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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: The probability that a randomly selected adult has an IQ less than 128 is (Type an integer or…

A: Given:  Consider X as a random variable that follows a normal distribution with mean 22 and…

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: Assume that the readings on thermometers are normally distributed with a mean of 0 degrees Celsius…

A: We have given that Mu= 0 , sigma =1 X~ N ( 0, 1) Zscore=(x-mu)/sigma

Q: Assume that blood pressure readings are normally distributed with a mean of 123 and a standard…

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Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 66…

A: Given : X~Nμ=66,σ=17

Q: mean and the standard deviation are 10 and 2 respectively. Find the arithmetic mean and the standard…

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Q: res light bulbs that have a length of life that is normally distributed with mean equal to 821 hours…

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Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 7…

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Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: given data,normal distribution μ=5σ=3probability that person will wait more than 9 minutes =?

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Let X be the distance in feet for a fly ball Given mean, μ = 270 feet Standard deviation, σ=42 feet

Q: Assume that women's weights are normally distributed with a mean given by mean=143 lb and a standard…

A:

Q: The life of light bulbs is distributed normally. The mean life time of a bulb is 520 hours and the…

A: Answer: Using the given data, Let X represent the life time of a light bulb X follows normal…

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: It is given that Mean of test scores = 1537 And SD = 315

Q: Go Yankees! 9) Assume that IQ scores of Red Sox fans are normally distributed with a mean of 63.6…

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Q: Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a…

A: Given Data Population Mean,μ = 0 Population Standard Deviation,σ = 1

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is…

A:

Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and standard deviation (σ)…

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a…

A: It is given that the,  that the readings on the thermometers are normally distributed with a mean of…