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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 =
A 2014 Pew study found that the average US Facebook user has 338 friends. The study...
A 2014 Pew study found that the average US Facebook user has 338 friends. The study also found that the median US Facebook user has 200 friends. The Pew study did not report a standard deviation, but given the number of Facebook friends is highly variable, let's suppose that the standard deviation is 194. Let's also suppose that 338 and 194 are population values (they aren't, but we don't know the true population values so this is the best we...
The Pew study did not report a standard deviation, but given the number of Facebook friends...
The Pew study did not report a standard deviation, but given the number of Facebook friends is highly variable, let's suppose that the standard deviation is 192. Let's also suppose that 338 and 192 are population values (they aren't, but we don't know the true population values so this is the best we can do). (Use 3 decimal place precision for parts a., b., and c.) a. If we randomly sample 120 Facebook users, what is the probability that the...
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...
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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