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According to a college survey, 22% ofall students work full time. a) Find the mean and...
Suppose the average number of hours full-time college students work per week is 25 with a...
Suppose the average number of hours full-time college students work per week is 25 with a standard deviation of 6 hours.. Random samples of 40 full time students are drawn. Find the mean and the standard deviation of the sample mean
Total sleep time of college students. A recent survey describes the distribution of total sleep time...
Total sleep time of college students. A recent survey describes the distribution of total sleep time among college students as approximately Normal with a mean of 6.78 hours and standard deviation of 1.24 hours.3 Suppose that we select a college student at random and obtain his or her sleep time. This result is a random variable X because, prior to the random sampling, we don't know the sleep time. We do know, however, that in repeated sampling, X will have...
According to a report of the National Foundation for Infectious Diseases 46% of all college students...
According to a report of the National Foundation for Infectious Diseases 46% of all college students in the US receive the flu vaccine. Suppose that 6 college students are selected at random. Let X = the number of college students who are vaccinated in a random sample of 6 college students. Suppose you are asked to produce a stick graph representing the distribution of X. How many sticks will be included in your stick graph? What is the distribution of...
Full-time college students report spending a mean of 28 hours per week on academic activities, both...
Full-time college students report spending a mean of 28 hours per week on academic activities, both inside and outside the classroom. Assume the standard deviation of time spent on academic activities is 4 hours. Complete parts (a) through (d) below. a. If you select a random sample of 25 full-time college students, what is the probability that the mean time spent on academic activities is at least 27 hours per week?
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we...
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we wish to estimate the mean number of hours, u, worked per week by college graduates employed full-time. We'll choose a random sample of college graduates employed full- time and use the mean of this sample to estimate u. Assuming that the standard deviation of the number of hours worked by college graduates is 6.30 hours per week, what is the minimum sample size needed...
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we...
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we wish to estimate the mean number of hours, H. worked per week by college graduates employed full-time. We'll choose a random sample of college graduates employed full-time and use the mean of this sample to estimate . Assuming that the standard deviation of the number of hours worked by college graduates is 6.00 hours per week, what is the minimum sample size needed in...
7. A survey of 800 college students is conducted to see whether they are a new...
7. A survey of 800 college students is conducted to see whether they are a new student this quarter or not. The random variable respresents the number of students enrolled as a new student. Is this a binomial experiment? Why or why not? Yes or No (Circle One) 8. A recent survey found that 79% of all adults over 50 wear sunglasses for driving. In a random sample of 80 adults over 50, what is the mean and standard deviation...
In a recent survey, the total sleep time per night among college students was approximately Normally...
In a recent survey, the total sleep time per night among college students was approximately Normally distributed with mean μ = 6.72 hours and standard deviation σ 1.24 hours. You plan to take an SRS of size n-150 and compute the average total sleep time. (a) What is the standard deviation for the average time? (Round your answer to three decimal places.) 101 hours (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample...
80% of students at a College live on campus. 120 randomly selected students at the college...
80% of students at a College live on campus. 120 randomly selected students at the college are surveyed and asked their living situation. Let p̂ be the proportion of students in the sample survey who report they live on campus. a) Find the mean and standard deviation of the sampling distribution of p̂. b) Use normalcdf with the sample proportion p̂ to determine the probability that at least 75% of the students in the survey live on campus.
Total sleep time of college students. A recent survey describes the distribution of total sleep time among college students as approximately Normal with a mean of 6.78 hours and standard deviation of 1.24 hours.3 Suppose that we select a college student at random and obtain his or her sleep time. This result is a random variable X because, prior to the random sampling, we don't know the sleep time. We do know, however, that in repeated sampling, X will have...
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we wish to estimate the mean number of hours, u, worked per week by college graduates employed full-time. We'll choose a random sample of college graduates employed full- time and use the mean of this sample to estimate u. Assuming that the standard deviation of the number of hours worked by college graduates is 6.30 hours per week, what is the minimum sample size needed...
Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we wish to estimate the mean number of hours, H. worked per week by college graduates employed full-time. We'll choose a random sample of college graduates employed full-time and use the mean of this sample to estimate . Assuming that the standard deviation of the number of hours worked by college graduates is 6.00 hours per week, what is the minimum sample size needed in...
In a recent survey, the total sleep time per night among college students was approximately Normally distributed with mean μ = 6.72 hours and standard deviation σ 1.24 hours. You plan to take an SRS of size n-150 and compute the average total sleep time. (a) What is the standard deviation for the average time? (Round your answer to three decimal places.) 101 hours (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample...
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