Out of a sample of 80 Youtube videos, 15 randomly-selected videos had a runtime of less...
Out of a sample of 80 Youtube videos, 15 randomly-selected videos had a runtime of less than 2 minutes. What is the probability under the empirical method that a video is less than 2 minutes? What is the probability a video is more than two minutes?
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Out of a sample of 80 Youtube videos, 15 randomly-selected
videos had a runtime of less...
A random sample of 40 videos posted to youtube was selected. A month later, the number...
A random sample of 40 videos posted to youtube was selected. A month later, the number of times that each had been viewed was tabulated. The mean number of viewings was 242 with a sample standard deviation of 320. Find the upper bound of the 99% confidence interval for the mean number of times videos posted youtube have been viewed in the first month. Round to the nearest integer.
Question 5 (1 point) A random sample of 40 videos posted to YouTube was selected. A...
Question 5 (1 point) A random sample of 40 videos posted to YouTube was selected. A month later, the number of times that each had been viewed was tabulated. The mean number of viewings was 126 with a sample standard deviation of 357. Find the upper bound of the 99% confidence interval for the mean number of times videos posted to YouTube have been viewed in the first month. Round to the nearest integer. Write only a number as your...
in a nursing home study, the researchers found that 15 out of 34 randomly selected small...
in a nursing home study, the researchers found that 15 out of 34 randomly selected small nursing homes had a resident vaccination rate of less 80%, while 17 out of 27 randomly selected large nursing homes had a resident vaccination rate of less than 80%. at a = 0.05, test the claim that there is a lower proportion of small nursing homes with a resident vaccination rate of less than 80% than large nursing homes. let small nurising homes be...
2. Suppose the mean length of a YouTube video is 7.45 minutes. Marcella wants to know...
2. Suppose the mean length of a YouTube video is 7.45 minutes. Marcella wants to know if YouTube videos are becoming shorter on average. She randomly chooses 30 YouTube videos made in the last month, and computes their mean length as 6.87 minutes and their standard deviation as 2.4 minutes. Can Marcella conclude that YouTube videos have become shorter in the last month? Use a significance level of 0.05. Note that since Marcella has a sample size of geq30, she...
2. (15 points) Suppose the time between arrivals of university shuttles in a randomly selected station...
2. (15 points) Suppose the time between arrivals of university shuttles in a randomly selected station has an exponential distribution with the mean of 15 minutes. a. (7 points) What is the probability that one randomly chosen student waits more than 20 minutes for the bus in that specific station? (8 points) What is the probability that one randomly chosen student waits between 10 and 15 minutes for the bus in that specific station? b.
a) The probability that a randomly selected household has one cat is (Simplify your answer.) b)...
a) The probability that a randomly selected household has one cat is (Simplify your answer.) b) The probability that a randomly selected family has more than one cat is (Simplify your answer.) A survey was conducted in which 125 families were asked how many cats lived in their households. The results are shown below. a) What is the probability that a randomly selected family has one cat? b) What is the probability that a randomly selected family has more than...
DIRECTIONS: Ask for the probability of a randomly selected item being less than a value that...
DIRECTIONS: Ask for the probability of a randomly selected item being less than a value that is larger than your mean(please show me the steps in how this is solved ) I sampled 8 books and found the mean length (# of pages) to be 276 with a sample standard deviation of 34 pages. Find the probability that a randomly selected book has less than 150 pages.
Videos are posted on a social media site at an average rate of 0.43 per second....
Videos are posted on a social media site at an average rate of 0.43 per second. a) What is the probability that 3 videos are posted in a 2 second time period? b) What is the expected time until the next video is posted? c) What is the probability the time until the next video will be more than 1 second but less than 2 seconds?
In a region, 80% of the population have brown eyes. If 15 people are randomly selected,...
In a region, 80% of the population have brown eyes. If 15 people are randomly selected, find the probability that at least 13 of them have brown eyes. Is it unusual to randomly select 15 people and find that at least 13 of them have brown eyes? Why or why not? The probability that at least 13 of the 15 people selected have brown eyes is (Round to three decimal places as needed.)
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package...
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package weights have a standard deviation of 5.3gm. The manufacturer believes that the average package weight is 100gm. Assuming the CLT applies and = 100, calculate the probability of obtaining a sample mean less than 98.5gm
Question 5 (1 point) A random sample of 40 videos posted to YouTube was selected. A month later, the number of times that each had been viewed was tabulated. The mean number of viewings was 126 with a sample standard deviation of 357. Find the upper bound of the 99% confidence interval for the mean number of times videos posted to YouTube have been viewed in the first month. Round to the nearest integer. Write only a number as your...
2. Suppose the mean length of a YouTube video is 7.45 minutes. Marcella wants to know if YouTube videos are becoming shorter on average. She randomly chooses 30 YouTube videos made in the last month, and computes their mean length as 6.87 minutes and their standard deviation as 2.4 minutes. Can Marcella conclude that YouTube videos have become shorter in the last month? Use a significance level of 0.05. Note that since Marcella has a sample size of geq30, she...
2. (15 points) Suppose the time between arrivals of university shuttles in a randomly selected station has an exponential distribution with the mean of 15 minutes. a. (7 points) What is the probability that one randomly chosen student waits more than 20 minutes for the bus in that specific station? (8 points) What is the probability that one randomly chosen student waits between 10 and 15 minutes for the bus in that specific station? b.
a) The probability that a randomly selected household has one cat is (Simplify your answer.) b) The probability that a randomly selected family has more than one cat is (Simplify your answer.) A survey was conducted in which 125 families were asked how many cats lived in their households. The results are shown below. a) What is the probability that a randomly selected family has one cat? b) What is the probability that a randomly selected family has more than...
In a region, 80% of the population have brown eyes. If 15 people are randomly selected, find the probability that at least 13 of them have brown eyes. Is it unusual to randomly select 15 people and find that at least 13 of them have brown eyes? Why or why not? The probability that at least 13 of the 15 people selected have brown eyes is (Round to three decimal places as needed.)
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package weights have a standard deviation of 5.3gm. The manufacturer believes that the average package weight is 100gm. Assuming the CLT applies and = 100, calculate the probability of obtaining a sample mean less than 98.5gm
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