Suppose that the average number of Facebook friends users have is normally distributed with a mean of 146 and a standard deviation of about 58. Assume fifty individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of ? ē - N( b. For the group of 50, find the probability that the average number of friends is less than 137. c. Find the first quartile for the average number of Facebook friends.

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

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A:

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A: Given :  the number of pieces per bag has a mean of , μ=264  a standard deviation of , σ =3   We…

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

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A: Note: As per the guidelines, we are only allowed to solve three subparts, please post the other…

Q: what percent of the students scored higher than 68?

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A:

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A:

Q: A review of all records in a large vetinary clinic show that indoor domestic cats at the clinic have…

A: Mean () =15standard deviation () =4sample size (n)= 37

Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…

A: Solution:- from given information claim:  if the average of 8 minutes will increase if the patient…

Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 70…

A: We are reauthorized to answer three sub parts at a time, since you have not mentioned which part you…

Q: ticular fruits weight are normally distributed with a mean of 285 grams and a standard deviation of…

A: According to the sum, A particular fruit weight is normally distributed with a mean of 285 grams and…

Q: Sally had a z score of +0.25 on a test with a mean of 62 and a standard deviation of 5. What was her…

A: From the provided information,Z score = +0.25

Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 30.…

A: ∗Mean μ=190    standard  deviation σ=30    X~N 190,30 we need to find,   PX<130+PX>250=P…

Q: The amount of coffee that people drink per day is normally distributed with a mean of 15 ounces and…

A: It is given that, Mean,μ =15 ounces Standard deviation, σ=4.5 ounces

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A: It is given that the scores follow normal distribution with mean 104 and standard deviation 14.…

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

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Q: An exam score has a mean of 504 and standard deviation of 90.  What exam score coresponds to a…

A: given data, An exam score has a mean of 504μ=504standard deviation of 90.σ=90  exam score(x)…

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.