# statistics

posted by .

Lorraine was in a hurry when she computed a confidence interval for . Because was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n + 1 instead of n - 1. v Will her confidence interval be longer or shorter than one found using the correct degrees of freedom n - 1?

a.
shorter

b.
longer

## Similar Questions

1. ### Statistics:Significance Test and Confidence Interv

Significance Test and Confidence Intervals In General: The article contains a 95% confidence interval. Would the margin of error in a 99% confidence interval computed from the same data be less, the same, or greater?
2. ### statistics

Ok, so I'm trying to do this for my exam review. I get some of it, but not all: An electric utility is examining the relationship between temperature and electricity use in its service region on warm days. The utility has bivariate …
3. ### Statistics

Which of the following statements correctly interprets a 95% confidence interval on a population mean?
4. ### Statistics

A confidence interval was used to estimate the proportion of statistics students that are females. A random sample of 72 statistics students generated the following 90% confidence Interval: (.43, .63). based on the interval above, …
5. ### statistics

a simple random sample of size n=5 is obtained from the population of drivers living in New York City, and the breaking reaction time of each driver is measured. The results are to be used for constructing a 95% confidence interval. …
6. ### statistics

Lorraine was in a hurry when she computed a confidence interval for μ. Because σ was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n instead of n - 1. Will her confidence …
7. ### statistics

For a sample size of 10 from a population whose standard deviation is not known, which type of probability distribution is used to help calculate a confidence interval for the mean?
8. ### Statistics

Which of the following statements best describes the uncertainty associated with a 95% confidence interval for a population proportion, computed from a simple random sample?
9. ### Statistics

Suppose x has a mound-shaped distribution with sigma = 9 . A random sample of size 36 has sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean m?
10. ### Statistics

To plan the budget for next year a college needs to estimate what impact current economic downturn might have on student requests for financial aid. Historically, this college has provided aid to 35% of its students. Officials look …

More Similar Questions