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Suppose that the average number of Facebook friends users have is normally distributed with a mean...
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 143 and a standard...
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 143 and a standard deviation of about 49. Assume forty-eight individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. What is the distribution of ¯ x ? ¯ x ~ N( , ) For the group of 48, find the probability that the average number of friends is less than 146. Find the third quartile...
III Suppose that the average number of Facebook friends users have is normally distributed with a...
III Suppose that the average number of Facebook friends users have is normally distributed with a mean of 146 and a standard deviation of about 56. Assume thirteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of a? - NGI b. For the group of 13, find the probability that the average number of friends is less than 125. c. Find the first quartile for the...
Suppose that the average number of Facebook friends users have is normally distributed with a mean...
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 136 and a standard deviation of about 44. Assume eight individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. What is the distribution of ¯x? ¯x ~ N For the group of 8, find the probability that the average number of friends is less than 143 Find the first quartile for the average number of...
The average price of a college math textbook is $175 and the standard deviation is $27....
The average price of a college math textbook is $175 and the standard deviation is $27. Suppose that 15 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of x? - NI b. For the group of 15, find the probability that the average price is between $171 and $177. c. Find the first quartile for the average textbook price for this sample size. S (round to the nearest cent) d....
It is reported† that the average or mean number of Facebook friends is 155. Suppose that...
It is reported† that the average or mean number of Facebook friends is 155. Suppose that when 50 randomly chosen Facebook users are polled regarding the number of their friends, the average number of their friends was reported to be x = 148 with a standard deviation of s = 29.5. Calculate the value of the z-statistic based on the sample mean, x. (Round your answer to two decimal places.) z =
Example 3) Suppose you want to study if female Facebook users have more friends on Facebook...
Example 3) Suppose you want to study if female Facebook users have more friends on Facebook on average than male Facebook users. To do this you first divide the country into four regions, West Coast, East Coast, Midwest, and South. Then you randomly sample men and women from all four regions and pool them together to make your two samples. Ultimately, you end up sampling 120 female Facebook users and 150 male Facebook users. You find that the female Facebook...
please round to 4 decimal places Suppose the age that children learn to walk is normally distributed with mean 12 mo...
please round to 4 decimal places
Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1.5 month. 15 randomly selected people where possible. were asked what age they learned to walk. Round all answers to 4 decimal places What is the distribution of X? X~N b. What is the distribution of ? N c. What is the probability that one randomly selected person learned to walk when the person was between...
please round to 4 decimal places The amount of coffee that people drink per day is normally distributed with a mean...
please round to 4 decimal places
The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a standard deviation of 5 ounces. 15 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. What is the distribution of X? X N b. What is the distribution of 7 -N c. What is the probability that one randomly selected person drinks between 15.5 and 17 ounces of coffee...
Facebook recently examined all active Facebook users and determined that the average user has 183 Facebook...
Facebook recently examined all active Facebook users and determined that the average user has 183 Facebook friends. Suppose that the population of number of Facebook friends of a randomly selected user has a standard deviation of \sigmaσ = 241. Facebook draws a SRS of 250 Facebook users. What is the probability that the average number of Facebook friends is less than 175? Apply the Central Limit Theorem.
reported in 2014 that the mean number of Facebook friends for 18- to 24-year-olds is 649....
reported in 2014 that the mean number of Facebook friends for 18- to 24-year-olds is 649. Assume the distribution is normal with μ=649 friends and standard deviation σ=150 friends. Find the probability that a randomly selected Facebook user has the following number of friends: Fewer than 424 friends. More than 949 friends. Between 424 and 949 friends. Find the number of Facebook friends that represents the 75th percentile. One particular Facebook user has 1174 friends. Is this unusual? On what...
III Suppose that the average number of Facebook friends users have is normally distributed with a mean of 146 and a standard deviation of about 56. Assume thirteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of a? - NGI b. For the group of 13, find the probability that the average number of friends is less than 125. c. Find the first quartile for the...
The average price of a college math textbook is $175 and the standard deviation is $27. Suppose that 15 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of x? - NI b. For the group of 15, find the probability that the average price is between $171 and $177. c. Find the first quartile for the average textbook price for this sample size. S (round to the nearest cent) d....
Example 3) Suppose you want to study if female Facebook users have more friends on Facebook on average than male Facebook users. To do this you first divide the country into four regions, West Coast, East Coast, Midwest, and South. Then you randomly sample men and women from all four regions and pool them together to make your two samples. Ultimately, you end up sampling 120 female Facebook users and 150 male Facebook users. You find that the female Facebook...
please round to 4 decimal places
Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1.5 month. 15 randomly selected people where possible. were asked what age they learned to walk. Round all answers to 4 decimal places What is the distribution of X? X~N b. What is the distribution of ? N c. What is the probability that one randomly selected person learned to walk when the person was between...
please round to 4 decimal places
The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a standard deviation of 5 ounces. 15 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. What is the distribution of X? X N b. What is the distribution of 7 -N c. What is the probability that one randomly selected person drinks between 15.5 and 17 ounces of coffee...
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