A) Population of Interest is the U.S. college students from which a sample of 300 students is collected
B) The variable measured is the number of hours of sleep per night by each individual
This is an Observational study as we are observing the sleep pattern of the students. This is not an experiment
C) Parameter of interest is the Mean number odf sleep hours of U.S. students in one day
D) Inference of Interest is the dependence of GPA on the number of sleep hours. Here, the Inference is that students who enjoy 7 hours of sleep a day excel in GPA as compared to those who do not have adequate sleep of 7 hours
E) No, the causal inference that 'more sleep increases gpa' is not supported by the study. Instead, the study is just a Statistical Inference which suggests that an adequate sleep of 7 hours produces better results as the mind is relaxed. However this does not suggest that if a person sleeps for 14 hours, then he would get better results. This is not the truth.
3. Suppose a random sample of 300 U.S. college students was obtained and the average number...
A scientific study was conducted to determine the hours of sleep that college students get per night. The college students surveyed slept an average of 7.8 hours per night. The margin of error of the survey was 0.5 hours. Construct a confidence interval for the average hours of sleep per night that college students get.
A random sample of community college students was asked the number of hours they sleep on a typical week-night during a given academic term. The sample data are as follows: 8 6 4 5 3 7 S 4 3 4 4 5 6 8 7 7 7 3 3 4 What is the 90% confidence interval estimate for the true mean amount of sleep time per night spent by community college students during a academic term? a) The data give...
A recent article in a college newspaper stated that college students get an average of 5.5 hrs of sleep each night. A student who was skeptical about this value decided to conduct a survey by randomly sampling 25 students. On average, the sampled students slept 6.25 hours per night. Identify which value represents the sample mean and which value represents the claimed population mean
College students average 7.8 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9 hours?
(1 point) College students average 7.2 hours of sleep per night with a standard deviation of 35 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 8 hours? Proportion =
A random sample of 48 students at a large university reported getting an average of 7 hours of sleep on weeknights, with standard deviation 1.62 hours.It is recommended, for most college age students, to get 8 hours of sleep each night. Does this sample provide evidence that college students at this university get significantly less sleep, on average, than what is recommended? a.Does the scenario represent a confidence interval or a hypothesis test?b.Does the scenario represent a one population or...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
A random sample of 51 college students shows that they spend, on average, 4.5 hours on video games every night, with a standard deviation of 1.25 hours. Construct a 98% confidence interval to estimate the mean number of hours that college students spend on video games every nigh
3. (5pts) It is believed that Lake Tahoe Community College (LTCC) Intermediate Algebra students get less than seven hours of sleep per night, on average. A survey of 22 LTCC Intermediate Algebra students generated a mean of 7.24 hours with a standard deviation of 1.93 hours. At a level of significance of 5%, do LTCC Intermediate Algebra students get less than seven hours of sleep per night, on average? Write out all work clearly!
Christine is the dean of students at a college. She is concerned about the amount of sleep students are getting. In particular, Christine is making an inquiry on whether students who are enrolled in the pre-med program are getting less sleep on average compared to students who are enrolled in other programs. The average amount of sleep per night for a random sample of 10 pre-med students and 10 students in other programs is recorded. Assume that the population standard...