A random sample of students was asked for the number of semester hours they are taking...
A random sample of students was asked for the number of semester hours they are taking this semester. The standard deviation was found to be 4.7 semester hours. a) how many students should be included in the sample to be 90% sure that the sample mean is within 1 semester hour of the population mean for all students at this college?
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A random sample of students was asked for the number of semester
hours they are taking...
A study is being planned to estimate the mean number of semester hours taken by students...
A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be σ = 4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean 3 is within one semester hour of the population mean gu for all students at this college?
A random sample of community college students was asked the number of hours they sleep on...
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...
4. A survey asked a random sample of 363 first-year students how many hours they studied...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
A random sample of students taking statistics was asked their GPA. The mean was 3.25 with...
A random sample of students taking statistics was asked their GPA. The mean was 3.25 with a standard deviation of 0.503. Find a confidence interval for the population mean.
1. To determine the average number of hours spent studying by college students per week, a...
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 46 college students reported the number of hours per day they typically...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their sample mean is, M = 2.61, and their standard deviation is, s = 1.02. What is the point estimate of the mean time spent per day on social media for the population of college students?
A small group of students was asked, "How many units are you taking this semester?" The...
A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17, 15, 15, 12. What is the mean? A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17, 15, 15, 12. What is the range? A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17,...
You are to estimate the average number of hours that students who are planning to enroll...
You are to estimate the average number of hours that students who are planning to enroll at a college in the fall semester will be taking. You don’t know the standard deviation (or variance), but from previous semesters you have an idea about the range. Historically, the lowest number of hours taken is 1 (usually a PE course). At the other end of the spectrum, the most hours a student has ever been enrolled for is 24. Using industry convention,...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their sample mean is, M = 2.61, and their standard deviation is, s = 1.02. If you plan to construct a 95% confidence interval for the population mean, what t critical value should you use based on this data?
suppose that the average number of credit hours that students take per semester is 16.3 hours...
suppose that the average number of credit hours that students take per semester is 16.3 hours (consider that to be the population mean). If 57.91% of students take less than 15.2 hours, find the standard deviation of credit hours for the population of students.
A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be σ = 4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean 3 is within one semester hour of the population mean gu for all students at this college?
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...
4. A survey asked a random sample of 363 first-year students how many hours they studied during a particular week. The mean was 15.3 hours. Suppose we know that the population standard deviation is 8.5 hours. Construct a 90%, 95% and 99% confidence interval for the mean study time of all first year students at this university. Interpret the 90% confidence interval.
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