statistics
posted by Sheri .
A sample of 200 students in a English class were asked How long did you sleep last night?
sample mean: 6.4 hours
S.D. = 1.6 HOURS
Standard Error = .11 hours
sample size = 200
What type of data is used in this example?
my answer: MEASUREMENT DATA
What would happen to the size of the Margin of error or confidence interval if the level of confidence were instead 68% and why?
My answer: the Margin of error would decrease because the level of confidence increased????

You used measures of central tendency and variability.
What was it before it was 68%? If the confidence interval increased, then your answer would be right.
Respond to this Question
Similar Questions

statistics
A company that manufacturers bookcases finds that the average time it takes an employee to build a bookcase is 23 hours with a standard deviation of 8 hours. A random sample of 64 employees is taken. What is the likelihood that the … 
statistics
Question 1 A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random … 
statistics
researchers believe a new sleep on average 10 hours per night ( ยต = 10), with a population standard deviation of 2.3 hours(s=2.3) it is assume that the number of hours of sleep per night is normal distributed , however you think this … 
Statistics
28. 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 a simple random sample, they surveyed 144 students. The statistics … 
statistics
ten randomly selected people were asked how long they slept at night. The mean time was 7.1 hours and the (sample) standard deviation was 0.78 hours. Find the 95% confidence interval of the mean time. Assume the variable is normally … 
AP Statistics
A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of … 
statistics
The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: On a week night, what percentage … 
statistics
The Office of Student Services at a large western state university maintains information on the study habits of its fulltime students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 … 
statistics
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours aday? 
statistics
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected …