a group of statistics students decided to conduct a survey at their university to find the...
a group of statistics students decided to conduct a survey at their university to find the average amount of time students spend studying per week. assuming a standard deviation of 5 hours, what is the required sample size if the error is to be less than 1/2 hour with 92% level of confidence?
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a group of statistics students decided to conduct a survey at
their university to find the...
9. A group of statistics students decided to conduct a survey at their university to find...
9. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a population standard deviation of three hours, what is the required sample size if the error should be less than a half hour with a 99% level of confidence? 10.University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence interval estimating the...
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A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week. Based on asimple random sample, they surveyed 144 students. The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours.What is the probability that average student study time is between 18 and 22 hours?
A survey of university students was conducted and found that students spend 2 hours per class...
A survey of university students was conducted and found that students spend 2 hours per class hour studying. A Teacher at your school wants to determine whether the time students spend at your school is significantly different from the two hours. A random sample of 15 Statistics Students is carried out and the findings report an average of 1.75 hours with a standard deviation of 0.24 hours. Test the 5% level of significance. a. Critical value of t = 1.761....
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 24 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 2.8 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
A group of business administration students want to conduct a survey in Caguas to find out...
A group of business administration students want to conduct a survey in Caguas to find out the demand from residents for vegetarian food. One of the first steps in a pilot study is to estimate the percentage of residents who like vegetarian food. In a previous study it was estimated that the proportion of residents who like vegetarian food is 0.46. To estimate a 95% confidence interval for the proportion of residents who like vegetarian food with no greater than...
An educational research group wants to know how many hours college students spend studying outside of...
An educational research group wants to know how many hours college students spend studying outside of class per week. If they survey 100 students and find an average 10.5 hours of studying a week, with a standard deviation of 2.25, find a 98% confidence interval for the true average number of hours spent studying. Answer choices: 10.5±.324 10.5±.225 None of these 10.5±.482 10.5±.524
A survey of 225 Statistics students showed that they spend an average of 5.2 hours studying...
A survey of 225 Statistics students showed that they spend an average of 5.2 hours studying for the class. Assume σ=.4. a) Construct a 99% confidence interval to estimate the mean amount of time spent studying. b) Interpret the confidence interval in the context of the problem.
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...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
13 . According to the American Time Use Survey, the typical American spends 154.8 minutes per...
13 . According to the American Time Use Survey, the typical American spends 154.8 minutes per day watching television. A survey of 50 Internet users results in a mean time watching television per day of 128.7 minutes, with a standard deviation of 46.5 minutes. Using 0.05 level of significance to test the claim that Internet users spend less time watching television. 14. College math instructors suggest that students spend 2 hours outside class studying for every hour in class. So,...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
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