Suppose that the number of Facebook friends users have is normally distributed with a mean of 117 and a standard deviation of about 47. Assume forty-three 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 43, find the probability that the average number of friends is less than 126.

Q: The population of weights for men attending a local health club is normally distributed with a mean…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given data:  mean = 0°C and  standard deviation =  1.00°C.  Assume that the readings at freezing on…

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: From 1776-1800, the average age of first marriage for a male in Western Europe was 26.4 years, with…

A: The question is about normal distributionGiven :Average age of first marriage for males ( ) = 26.4…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u= 105 and a standard…

A: Solution

Q: The scores on a mathematics exam have a mean of 71and a standard deviation of 8. Find the x-value…

A: Let X denote the scores on a mathematics exam and it follows normal distribution with mean of…

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: 2. The heights are measured for a simple random sample of 9 supermodels. They have a mean of T =…

A:

Q: he IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one…

A: Given that  Mean=100 SD=15 X = IQ of an individual. The probability that a randomly selected person…

Q: Females have pulse rates that are normally distributed with a mean of 74 beats per minute and a…

A:

Q: All of the accountants at a small paper company are required to take the same accounting exam to…

A:

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: Given Data Population Mean,μ = 0.0 Population Standard Deviation,σ = 1.0

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

A: Given that μ=142σ=13n=49

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A:

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A: Let X denote the readings at freezing on a bundle of thermometers are normally distributed with a…

Q: Provide all necessary computations and a properly labeled curve in asnwering the following. Sam…

A:

Q: MAKE SURE YOU SELECT 2 ANSWERS FOR THIS QUESTION - Type of test and hypothesis. A meteorologist…

A: Given population mean μ=0.46  Population standard deviations σ=0.12

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: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given that  A batch of thermometers are normally distributed . Mean ( μ) =  0°C  Standard deviation…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given: Mean (µ) = 0oC Standard deviation (σ) = 1.000C X~N (0, 1)

Q: In a survey, the mean weight of 1005 rats was calculated to be 132 gr. The standard deviation of the…

A:

Q: 18 men will be tested for the discus throw. if Mu= 112ft and standard deviation= 13ft. find the…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: The distribution of IQ scores of the population is normally distributed with a mean of 100 and a…

A: Given that  The data is normally distributed with  Mean (μ) = 100 Standard deviation (σ) = 15   We…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A:

Q: The United Nations stores statistics about all the live births in the United States. The latest data…

A:

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

A: It is given that the mean is 0 and standard deviation is 1.

Q: The average American man consumes 9.9 grams of sodium each day. Suppose that the sodium consumption…

A: Answer of last part may vary if you take table z value other than two decimal places

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A:

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A:

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: The average amount of money spent for lunch per person in the college cafeteria is $7.36 and the…

A:

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A:

Q: Mason earned a score of 226 on Exam A that had a mean of 250 and a standard deviation of 40. He is…

A: First find the standardised Z score and the make equivalency

Q: The air control informs the pilot of an aircraft about the altitude of the centre of the air…

A: Given problem Given that   The air control informs the pilot of an aircraft about the altitude of…

Q: Find the probability for each house that the electric usage will not exceed 400W. 2. Find the…

A:

Q: The Michelin tires in average will last for 60000 miles. A technician claims that the deviation of…

A: Given data The Michelin tires in an average will last for 60000 miles. The standard deviation is…

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.