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 Facebook friends.
For part b), is the assumption that the distribution is normal necessary yes or no
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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 146 and a standard deviation of about 55. Assume seven individuals are randomly chosen. Answer the following questions. Rourd all answers to 4 decimal places where possible. a. What is the distribution of 2? 655 b. For the group of 7, find the probability that the average number of friends is more than 158. c. Find the third quartile for the average number...
Statistics ch. 7
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 111 and a standard deviation of about 45. Assume fourteen 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 14, find the probability that the average number of friends is less than 106. Find the third quartile for the average number of Facebook friends. For part b), is the...
The lengths of adult males' hands are normally distributed with mean 189 mm and standard deviation...
The lengths of adult males' hands are normally distributed with mean 189 mm and standard deviation is 7.4 mm. Suppose that 8 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of ? - NG b. For the group of 8, find the probability that the average hand length is less than 191. c. Find the first quartile for the average adult male hand length for this sample size. d. For part b),...
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...
The amount of syrup that people put on their pancakes is normally distributed with mean 56...
The amount of syrup that people put on their pancakes is normally distributed with mean 56 mL and standard deviation 13 mL. Suppose that 41 randomly selected people are observed pouring syrup on their pancakes. Round all answers to 4 decimal places where possible. What is the distribution of X ? X ~ N( , ) What is the distribution of ¯ x ? ¯ x ~ N( , ) If a single randomly selected individual is observed, find the...
Suppose the age that children learn to walk is normally distributed with mean 11 months and...
Suppose the age that children learn to walk is normally distributed with mean 11 months and standard deviation 1.5 month. 11 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-NG 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 10 and 12 months...
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.
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 of 146 and a standard deviation of about 55. Assume seven individuals are randomly chosen. Answer the following questions. Rourd all answers to 4 decimal places where possible. a. What is the distribution of 2? 655 b. For the group of 7, find the probability that the average number of friends is more than 158. c. Find the third quartile for the average number...
The lengths of adult males' hands are normally distributed with mean 189 mm and standard deviation is 7.4 mm. Suppose that 8 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of ? - NG b. For the group of 8, find the probability that the average hand length is less than 191. c. Find the first quartile for the average adult male hand length for this sample size. d. For part b),...
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...
Suppose the age that children learn to walk is normally distributed with mean 11 months and standard deviation 1.5 month. 11 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-NG 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 10 and 12 months...
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