STATs 353
posted by Kim .
Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.)
Before
68,58,64,62,58,67
After
40,42,46,37,45,38
Lower limit:
Upper limit:

STATs 353 
MathGuru
You'll need to start by finding a confidence interval for 2 samples.
Here is one you might be able to use:
CI = (mean difference) ± tvalue (standard deviation difference/√n)
You will need to calculate the means and standard deviations.
Tvalue is found using a ttable for 98% confidence.
n = sample size
Once you have the interval calculated, you will have the lower and upper limits.
Respond to this Question
Similar Questions

college statistic
A sample of 51 nightschool students' ages is obtained in order to estimate the mean age of nightschool students. x = 26 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one … 
math help
Two hundred fish caught in Cayuga Lake had a mean length of 14.1 inches. The population standard deviation is 2.9 inches. (Give your answer correct to two decimal places.) (a) Find the 90% confidence interval for the population mean … 
Math help
Could someone work one of these out so I can use as example. A sample of 59 nightschool students' ages is obtained in order to estimate the mean age of nightschool students. x = 25 years. The population variance is 20. (a) Give a … 
math check
A machine produces parts with lengths that are normally distributed with ó = 0.52. A sample of 16 parts has a mean length of 75.07. (a) Give a point estimate for ì. (Give your answer correct to two decimal places.) 75.07. (b) Find … 
Math help
Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 50 55 61 52 68 54 After 34 58 56 36 40 39 Lower Limit Incorrect: Your answer … 
math
Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct … 
Statistics
Find the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct … 
Statistics
Find the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct … 
statistics
A sample of 65 nightschool students' ages is obtained in order to estimate the mean age of nightschool students. x bar = 25.2 years. The population variance is 28. (a) Give a point estimate for ì. (Give your answer correct to one … 
Statistics
Thirtythree small communities in Connecticut (population near 10,000 each) gave an average of x = 138.5 reported cases of larceny per year. Assume that σ is known to be 42.9 cases per year. (a) Find a 90% confidence interval for …